Where are stars formed?
A. A planetary nebula
B. Near the center of the universe
C. A nebula

What is a black hole?
A. A collapsed star with gravity so dense nothing can escape it
B. A cool spot on the surface of a star
C. An area in space where stars are created

What factor(s) impacts the life cycle of a star?
A. Energy
B. Mass
C. Size
D. All of the above

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