Answer:
1. protostar
Explanation:
Protostar is a star in the process of forming.
Everything Stat in relatively small molecular clouds called dense cores.
As the dense core accrues mass from its larger, surrounding cloud, self-gravity begins to overwhelm pressure, and collapse begins.
The gas that collapses toward the center of the dense core first builds up a low-mass protostar. Regardless of the details, the outer surface of a protostar consists at least partially of shocked gas that has fallen from the inner edge of the disk.
The energy generated from ordinary stars comes from nuclear fusion occurring at their centers. Protostars also generate energy, but it comes from the radiation liberated at the shocks on its surface and on the surface of its surrounding disk.
