Homeostasis refer to the metabolic balance being maintained by several processes. It may include having a stable internal physiologic condition such as the blood ph or body temperature. Among the options, the best answer would be c. the villi of the small intestine would increase the absorption of nutrients from small intestine to the blood.
You have to think of contaminated water if it were to evaporate it can effect the water cycle of an environment
photosynthesis is the process that producers go through to make food using sunlight.