You need to know everything is made of atoms they are always colliding and they are never still because you'd think that every thing in space is still all the time even if it's not making visibly
The answer is c. The particles of b are more closely packed
I Know it is b i got my dad to help me with that test
The forms of kinetic energy are motion, heat, sound and light.
So according to your options, I choose D) Sound energy.
The river provides fertile soil for farming
