Question

based on the list of word roots, what is the correct spelling of a word that means \a vehicle that moves by itself\?
aud = \hear\
auto = \self\
mob = \move\
automobile
audimobile
autamobile

Explanation:

The word root "auto" means "self" and "mob" means "move". Combining them gives "automobile" which means a vehicle that moves by itself. "Aud" means "hear" and is not relevant here. Also, "autamobile" is a mis - spelling.

Answer:

automobile