Answer:
What has 4 legs in the morning, 2 legs in the evening and 3 legs in the night?
You saw me where I never was and where I could not be. And yet within that very place, my face you often see.
I am free for the taking. Through all of your life, though given but once at birth. I am less than nothing in weight, but will fell the strongest of you if held.
I never was but always will be. No one ever saw me but everyone knows I exist. I give people the motivation to better themselves every day. What am I?
A man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.