Answer:
I help engines spin and pants stay up.
A dagger thrust at my own heart dictates the way I'm swayed. Left I stand and right I yield to the twisting of the blade. What am I?
Teenage girls are pros at creating me. Learn me in classes.
I am black within and red without; with four corners round about. What am I?
I am a fruit. If you take away the first letter of my name I become a crime. What am I?
What language does a billboard speak?