Answer:
I am confused on what this is supposed to be, but if you are talking about chemicals, then your answer is sulfur.
Hoped this is what you're looking for. Sorry if it isn't. I would love to help, but it needs to be more specific.
Answer: Pastoral nomads
Explanation: Pastoral nomads are producers of food, and the size of their tribal or ethnic units increases accordingly. These groups raise livestock, and they move about within their established territory to find good pastures for their animals.
Answer:
winds pick up speed more gradually in the summer
Answer:
Weathering makes the rocks smooth