Final answer:
A white dwarf star is closest to the size of Earth.
Step-by-step explanation:
The type of star that is closest to the size of Earth is a White Dwarf.
A white dwarf is the remnant of a low-mass star that has exhausted its nuclear fuel. These stars are about the size of a planet, such as Earth.
Unlike giant and supergiant stars, which are much larger than Earth, and neutron stars, which are extremely dense and small, white dwarfs have a size comparable to Earth.
Learn more about Stars and their sizes