3 and 1 because nothing goes into 3 or 1 so I rest my case
Answer:
d. the accumulation of greenhouse gases in the earth's atmosphere.
Explanation:
clean water supply and improved technology
The answer is D.
I am pretty sure, I hope this helps
physical weathering is also referred to as mechanical weathering. it involves the mechanical breakdown or disintegration of exposed rock Institute
temperature is an important fact of physical weathering. It occurs when rocks are broken down as a result of alternating expansion and contraction of rocks surfaces due to temperature changes .