Answer:
What turns from red to black as soon as it touches water?
A red drum which sounds without being touched, and grows silent, when it is touched.
Often held but never touched. Always wet but never rusts. Often bits but seldom bit. To use it well you must have wit.
What begins and has no end? What is the ending of all that begins?
What has roots that nobody sees, and is taller than trees. Up, up it goes, and yet it never grows.
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.