Question

1. which moon is almost half the size of the planet it rotates around? proteus titan charon deimos

Explanation:

Charon is a moon of Pluto, and it is about half the size of Pluto. Proteus is a moon of Neptune and is much smaller relative to Neptune. Titan is a moon of Saturn and is not close to half the size of Saturn. Deimos is a moon of Mars and is tiny compared to Mars.

Answer:

C. Charon