Answer:
I am pretty sure it is B, weathering and erosion. Hope this helps!
Answer: Plants
Explanation: Plants are all ways at the start of the food chain becuase they are the only thig that can make their own food. Herbivores eat the plants to gain energy and carnivores eat the herbivores to gain their energy.
photochemical smog is also known as summer smog is the chemical reaction of sunlight. Volatile and nitrogen oxides compound in the atmosphere which then leaves airborne particles.
Viruses consist of two key elements- a nucleus acid molecule and a protein coat.
If a cell is not carefully controlled it can cause cancer. which causes cells to happen too fast.
