a. vitamins.
b. everyday.
I'm not 100% sure on b. but a. has to be vitamins.
The change in the composition of species in the community over time is the best answer
Answer: Their growth is strongly affected by the environmental conditions found in the root zone.
Explanation: To survive and grow, they need Air (gas exchange), Water, Non-limiting Temperature, Carbohydrates, Minerals, Space, Low Soil Density, Microbial Associations and Non-toxic soil chemistry.
Answer:
remove waste and other harmful substances from the body
Explanation: