Answer:
Millions of these are crushed every morning to help people wake up.
Can a kangaroo jump higher than a house?
How much does it cost to go to Hogwarts?
It is everything to someone, and nothing to everyone else. What is it?
What has many keys, but can't even open a single door?
I repeat only the last word you say. The more I repeat, the softer I got. I cannot be seen but can be heard. What am I?