In planetary science, the core-accretion model posits that giant planets form by first accumulating a massive solid core, which then rapidly attracts surrounding hydrogen and helium gas. For planets forming far from their host stars, this gas is cold and dense, making it highly susceptible to rapid gravitational collapse onto the core. ________ the gas envelope is captured in a brief geological window rather than over tens of millions of years.
Which choice completes the text with the most logical transition?
- Therefore,Cevap
- BNevertheless,
- CFurthermore,
- DPreviously,
Cevap
Therefore,
The correct option is 'Therefore,' because the relationship between the sentences is cause-and-effect. The first sentence explains that gas far from host stars is highly susceptible to rapid gravitational collapse. The second sentence states the result of this susceptibility: the gas envelope is captured in a brief geological window. 'Therefore' logically signals this cause-and-effect connection.
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Transitions: Cause and Effect