The only noun I know derived from the verb to entomb would be the noun entombment.
It is an abstract noun, which means that it doesn't have a physical shape - you cannot touch it or smell it, just like with love, or hate, or happiness. Entombment is the process of placing a dead body into a tomb, or a grave.
Answer:
How did he invent a way to recycle rubber?
Explanation:
ummm, hope this helps...
A. Would be correct because mayor is the subject and lives being the verb.