Question

I need help with this homework:

Answer 1

Yes. You do.  Try thinking about it in reverse:

One obvious form of mechanical energy in an organism is the energy
that you have in you to make your muscles work, to move you around,
to throw a ball, to pick stuff up, etc.y

Where does the energy come from to make your muscles work ?
It comes from the food you eat.

Where does the energy in the food you eat come from ?
It comes either from the plants you eat, or else from the plants that
the animals you eat eat.  (Or possibly from the plants eaten by an
animal before that animal is eaten by an animal that you eat.)

Where does the energy come from that's stored in the plants ?
It comes from the sun.

So there. You've traced the path backward, from the mechanical energy
in the organism, back to the sun.  Can you turn it around now, and trace
it forward ?

Answer 2

Light energy (sun)(by photosynthesis)---> plants(stored in fruits stem and other parts)---> consumed by herbivores and omnivores(these are inturn the prey of carnivores)--->all these animals release energy by oxidising glucose from plants(this energy is used by animals to move their muscles, locomote etc. that is, the energy from sun is converted to mechanical energy)