The melting of the polar ice cap
Answer:
Every river is part of a larger system—a watershed, which is the land drained by a river and its tributaries. Rivers are large natural streams of water flowing in channels and emptying into larger bodies of water.A tributary is a smaller stream or river that joins a larger or main river.
Answer:
Answer is A environment and society
I believe the answer would be A. Diffusion is "the spreading of something more widely" Which fits in with this.
Answer:
71%
Explanation:
Pleade vote brainest it will really help