Test TestGo
♫
Now Playing
Ambient Radio
♫

Keep Learning?

Sign in to continue practicing.

Missing Sentence
The given sentence is missing in the paragraph below. Decide where the given sentence best fits among the options (1), (2), (3), or (4) indicated in the paragraph. Sentence: Such grids, primarily designed for the predictable, baseload generation of fossil fuel power plants, lack the inherent flexibility to efficiently manage rapid fluctuations in supply. Paragraph: The global imperative for decarbonization has dramatically accelerated the integration of variable renewable energy sources like solar photovoltaics and wind turbines. However, their inherent intermittency and non-dispatchability pose acute stability and reliability challenges to legacy electrical grids. (1) This fundamental architectural mismatch between a predominantly centralized, demand-driven infrastructure and a distributed, supply-side variable power profile necessitates a profound systemic overhaul. (2) Consequently, advanced grid modernization—incorporating smart grid technologies, robust energy storage solutions, and dynamic demand-side management—becomes indispensable for maintaining equilibrium. Yet, the economic ramifications of these extensive upgrades, particularly concerning stranded assets and upfront capital expenditure, are profound. (3) Furthermore, recalibrating established regulatory frameworks and fostering multilateral stakeholder collaboration present formidable institutional and political hurdles. (4) Ultimately, navigating this complex energy transition demands a cohesive strategy encompassing technological innovation, innovative market mechanisms, and adaptive governance.
Correct Answer: Option 1 1. Logical Contextual Analysis: Before Option 1: The paragraph states that "their inherent intermittency and non-dispatchability pose acute stability and reliability challenges to legacy electrical grids." This sets up the problem. The Inserted Sentence: The sentence uses the pronoun "Such grids" to refer directly to the "legacy electrical grids" mentioned previously. It then elaborates on *why* these challenges exist by explaining the fundamental design flaw of these grids: their optimization for predictable fossil fuel generation and their consequent inability to handle fluctuating renewable supply. This provides the crucial explanatory detail for the preceding statement. After Option 1: The sentence immediately following begins with "This fundamental architectural mismatch," which serves as a direct logical continuation and summary of the incompatibility described by the inserted sentence between the legacy grid design and the characteristics of renewable energy sources. 2. Why the other options are incorrect: Option 2: Placing the sentence here would disrupt the logical flow. The preceding sentence discusses the "fundamental architectural mismatch" necessitating a "systemic overhaul." The inserted sentence, which explains the *cause* of this mismatch, would be out of place after the consequence has already been stated. Furthermore, "Such grids" would awkwardly refer back too far or to the "systemic overhaul" itself, which doesn't make sense. Option 3: This option is placed amidst a discussion of the "economic ramifications" of upgrades, specifically "stranded assets and upfront capital expenditure." The inserted sentence, which details the design limitations of traditional grids, is completely unrelated to financial costs and would introduce an abrupt and jarring shift in thematic focus. Option 4: This option occurs after the paragraph has moved to discussing "regulatory frameworks" and "institutional and political hurdles." Inserting the sentence here would revert to an earlier point about basic grid design principles, breaking the thematic progression towards broader challenges and the concluding strategy for the energy transition. 3. Placement Summary: The sentence logically explains *why* legacy electrical grids face stability challenges from renewable energy by detailing their design limitations, thereby setting up the subsequent discussion of an "architectural mismatch."
← →