By diffusion hope this helps
Chloroplasts - found only in plants and algae. they convert solar radiation energy to chemical energy usable for the cell's metabolism.
mitochondria - found in both plants and animals, they produce energy (in the form of ATP - chemical compound) by decomposing sugars and fats. they use up oxygen to do it.
The insects clustered around the light is an example of A response to a stimulus. The insects are attracted to the light, so the flocked towards it.
