medium · SAT Reading & Writing

Astrophysicists have observed that the 'stellar wind' from massive stars can clear large regions of interstellar gas, creating massive bubbles in the surrounding medium. ______ these winds are often responsible for triggering the collapse of nearby gas clouds, leading to the birth of new stars at the edges of the bubbles.

1. Conversely,
2. Furthermore,
3. Initially,
4. Nevertheless,

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