Well it's energy comes from the sun since the sun gives it sunlight to help it grow
A) 0
because all of the forces cancel out, so it is not moving with balanced forces.
There's only one question there.
The answer is "Greater amplitude".
Answer:
man will move in opposite direction with speed

Explanation:
As we know that man is lying on the friction-less surface
so here net force along the surface is zero
so if we take man + stone as a system then net change in momentum of this system will become zero
so here we have


here we have


