Answer:
The Retina
Explanation:
The photoreceptors lie at the back of the retina
The answer is D. The digestive system provides energy to your muscular system by breaking down foods and using those nutrients to create energy. It is like how when you are starving, you feel weak because you don't have energy. When you eat something you get more energy so you can move
True because they are used to this system
Answer:
D. Chemical - mechanical - thermal
Explanation:
D because the food is chemical and the mechanical is the human excersice, and it results in thermal
Hair color or Eye color , one of the two
