Question

question 19 of 28
which celestial body is a very dense, hot, and old star?
a. a black hole
b. a red giant
c. a nebula
d. a white dwarf

Explanation:

A white - dwarf is a very dense, hot, and old star. It is the remnant of a low - to medium - mass star that has exhausted its nuclear fuel. A black hole is not a star but a region in space with extremely strong gravitational pull. A red giant is a large, cool star in a late stage of its life. A nebula is a giant cloud of dust and gas in space where stars are born.

Answer:

D. A white dwarf