____ occurs when most of the material collapsing to form a protostar has fallen into a disk around the star,and a strong wind from the warm protostar ejects material from its poles.
A) An emission nebula
B) Hydrostatic equilibrium
C) The proton-proton chain
D) The thermonuclear fusion of hydrogen
E) A bipolar flow

Question

Quizplus · Accepted Answer

A bipolar flow occurs when a protostar ejects material from its poles, often due to strong winds, after most of the collapsing material has formed a disk around it.

____ Occurs When Most of the Material Collapsing to Form