a star similar to our Sun a cloud of dust and gas an oxygen-rich atmosphere a gravitational acceleration of 9.8 m/sec2
I gave my students this multiple choice question: A scientist is searching for areas where new solar systems might form. What feature is the scientist looking for?

Only one answer is correct among these 4 choices:
- a star similar to our Sun
- a cloud of dust and gas
- an oxygen-rich atmosphere
- a gravitational acceleration of 9.8 m/sec2

Could you tell me which one is correct?

a cloud of dust and gas