Answer:
Energy.
Explanation:
Energy can be considered as the factor which is responsible for matter changing and moving in an animal's body. This energy is used by animal for a variety of functions. Energy helps them to be cured from injury and growth. Motion also required energy.
Answer:
Photosynthesis.
Explanation:
Plants are autotrophs, which means they produce their own food. They use the process of photosynthesis to transform water, sunlight, and carbon dioxide into oxygen, and simple sugars that the plant uses as fuel. These primary producers form the base of an ecosystem and fuel the next trophic levels
Because they would kill each other