Which statements are true of a white dwarf?
a. it has a red shell.
b. it is the result of the core collapse of a low-mass star that sheds its outer layers.
c. it emits massive amounts of light compared with other stars.
d. it strongly attracts all matter or energy that comes near it.
e. it cools down to become a black dwarf.

Option B, It is the result of the core collapse of a low-mass star that sheds its outer layers.

Explanation:

Stars which reaches the end of their evolution process becomes a white dwarf. The diameter of white dwarf is 0.01 times the diameter of sun but their masses are equivalent to each other. Stars at the stage of white dwarf are short of fuel as they have burned up its entire hydrogen. This leads to slowing down of fusion process followed by collapsing of stars on their own.

hence, only option B is correct

the answer is tropical areas. the tropical areas obtain more

radiant energy from the sun than they lose to space through terrestrial

radiation, and vice versa for polar areas. earth has an energy remaining in the

tropics and an energy scarcity for the polar areas.

explanation:

the correct answer is:

a population changes in response to a change in the environment.