I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

What does below rebus means ?

Which part of London exists in France as well ?

What number when divided in half becomes zero?

I cannot talk, but I always reply when spoken to. What am I?

Which flower has two lips?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

Mr Red Lives in the red house.
Mr Green Lives in the greenhouse.
Mr Yellow Lives in the yellow house.

Who lives in the Whitehouse?

He runs but never walks. Murmurs, but never talks. Has a bed, but never sleeps. And has a mouth, but never eats?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?