"Binary" means there are two stars. And "protostar" means the stars are in an early, or preliminary, stage.
the color of the protostar is red
A Protostar.
As gravity pulls more material toward the center of the protostar, the pressure inside the protostar builds.
A protostar will live as long as 100,000 years. After material stops falling on the protostar it will enter then T Tauri star phase.
A protostar is more like a stage previous to a star - before it ignites.
A protostar takes about 100,000 years to reach the main sequence.
No. The sun was a protostar about 4.6 billion years ago.
The term is "protostar", not "prostar". Yes. A protostar is an early stage of a star.
Apparently someone not paying ATTENTION.
No one. It comes from the Greek - proto - meaning first. So first star - a protostar.
No one
trapping of thermal energy inside the protostar