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: Prior to
Explanation: Picking "prior to" is basiclly saying do this and this BEFORE you leave the house. While as after is once you leave the house do all of thoes things which wouldn't make sense.
Where are the statements?