In which way are protostars different from main-sequence stars of the same mass?
A) Protostars are smaller than main-sequence stars.
B) Protostars are hotter than main-sequence stars.
C) Protostars have a different energy source from main-sequence stars.
D) Protostars have longer lifetimes than main-sequence stars.

Question

Quizplus · Accepted Answer

Protostars generate energy through the gravitational contraction of gas, whereas main-sequence stars produce energy primarily through nuclear fusion, typically converting hydrogen into helium.

In Which Way Are Protostars Different from Main-Sequence Stars of the Same