Answer:
What is it which builds things up? Lays mountains low? Dries up lakes, and makes things grow? Cares not a whim about your passing? And is like few other things, because it is everlasting?
What has a big mouth, yet never speaks?
It's been around for millions of years, but is never more than a month old. What is it?
What has 4 legs in the morning, 2 legs in the evening and 3 legs in the night?
What can be swallowed, But can also swallow you?
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.