The sun because of photosynthesis in plants, then herbivores who eat plants then the carnivores who eat the herbivores who ate the plants.
Answer:
d . different population of the same species physically separated from each other forming new species.
I think the answer is <span>epithelial and connective tissue
Muscle cells need much energy to moves its fiber, so it must be on a highly vascularized area. The nervous system also needs a blood supply to works. In fact, the brain cells use the highest amount of energy.
Epithelial and connective tissue doesn't need much energy because its main function is to protect other tissue. It also has densely packed cells to make it sturdy.</span>
<span>A large complement of decomposers rapidly turns dead plant and animal matter into nutrients that are quickly taken up by plants.
Also, some animals live on eating plants, other animals eat those that live on plants, and animals that live on eating other animals die to make nutrients that are eaten by plants; this also, is called an ecological food chain.</span>
