The sun is the ultimate source of energy and the process is Photosynthesis.
They get different weather patterns than a jungle, flatland, prairie, or taiga. it's just it's own thing.
Blood, urine, tissue/skin, saliva, hairs, etc.
A more kind of fighting state, it will try new ways to attack the squirrell
Is this school work ? can you tell me so i can tell you professical or common