Question

which event takes place first in the stages before the birth of a star?
○ gravity pulls gas and dust together.
○ a protostar forms as mass increases.
○ nuclear fusion begins under high pressure.
○ a protostar collapses and becomes denser.

Explanation:

Star formation starts with a molecular cloud of gas and dust. The initial trigger is gravitational attraction, which pulls these dispersed materials together. This concentration of mass leads to protostar formation, followed by further collapse, and finally nuclear fusion when pressure and temperature are high enough.

Answer:

Gravity pulls gas and dust together.