Question

Alana drew a diagram to compare the life cycles of low-mass and high-mass stars.

Which labels belong in the areas marked X, Y, and Z?

A.) X: Nuclear fusion forms hydrogen in the main sequence star.
Y: A white dwarf is part of the cycle.
Z: A supernova is part of the cycle.

B.) X: A white dwarf is part of the cycle.
Y: Nuclear fusion forms hydrogen in the main sequence star.
Z: A supernova is part of the cycle.

C.) X: A protostar is part of the cycle.
Y: It begins in a nebula.
Z: nuclear fusion forms hydrogen in the main sequence star.

D.) X: It begins in a nebula.
Y: Nuclear fusion forms hydrogen in the main sequence star.
Z: A protostar is part of the cycle.

Answer 1

Answer: b

Step-by-step explanation:

Answer 2

B

Step-by-step explanation:

Both low and high mass stars begin as nebulae, then become protostars. Both use nuclear fusion to form hydrogen in the main sequence.

The differences are that low mass stars have longer life cycles and become white dwarfs. High mass stars have shorter life cycles and undergo supernova explosions.