Long Riddles and Answers

Question: I live in your house yet, you do not love me. I eat your food, yet you squeal in fright at the sight of me. What am I?

Question: Using 16 coins, how can you make $1 by using pennies, nickels, dimes, and quarters? Hint: There is only 1 quarter.

Question: Surrounded by life , yet life is its biggest enemy. But without life there is no need for it to exist. What is it?

Question: How many people do you need to have the odds be in favor (at least 50% chance) of two people having the same birthday?

Question: Walk on the living, they don't even mumble.
But walk on the dead, they mutter and grumble.

What are they?