A grasshopper may use the energy to move around, store it or use it for nutrients. There may be many answers to this.
Can you be more specific with the question. Are you talking about DNA coding with complementary bases?
The light will enter they eye and it will be refracted as it
passes through the cornea. It will then pass the pupil which is controlled by
iris and will be further refracted by the lens. The cornea and lens together
will form a compound lens in order to project images which are inverted into the
retina.
Fungi eat the dead plants aka nutrients to stay alive