Answer:
Everyone has it and no one can lose it, what is it?
Fuels backyard get-togethers
We are five little objects of an everyday sort, You will find us all in a tennis court.
A morbidly-named body of water
Soldiers line up spaced with pride. Two long rows lined side by side. One sole unit can decide, if the rows will unite or divide.
I am rarely touched but often held. If you are smart you'll use me well. What am I?