Answer:
I help engines spin and pants stay up. What am I?
The more you have me the less you see. Shine a light on me and I shall flee.
I can speak with my hard metal tongue. But I cannot breathe, for I have no lung. What am I?
I belong to everyone. Sometimes make you happy, sometimes make you sad. I will never end until the day you do. What am I?
I have a neck but no head. I have a body but no arm. I have a bottom but no leg. What am I?
I repeat only the last word you say. The more I repeat, the softer I got. I cannot be seen but can be heard. What am I?