Describe how acid rain falling in a forest could disrupt the
trophic structure of the ecosystem.

The answer is observations and interpreting.

Mitochondria produce atp, a high energy compound. atp is used for all sorts of enzyme-mediated reactions, such as making proteins/nucleotides/etc, certain compounds cross the cell membrane, muscles move, etc.  without this source of energy, a cell will die. it will not be able to repair itself, defend against pathogens, etc.

We are not able to see the stars. light prevents our seeing the stars. i hope it kinda : )