Answer:
I break down buildings, I crumble mountains but you can't see me. What am I?
Sing me to a baby about to go to sleep.
Feed me and I live. Give me water and I die. What am I?
I am an activity involving pins flying in the air.
Before Mt. Everest was discovered what was the highest mountain in the world?
Runs over fields and woods all day. Under the bed at night sits not alone, With long tongue hanging out, Resting at your feet until we go for a walk