Different environments helped contribute to different cultures because people a. made use of the resources in their particular r
egion. b. had no way to communicate with one another over long distances. c. had wars that destroyed the environment and affected culture. d. borrowed from one another but changed things to suit their needs.
The answer is D. The question asks how different cultures influenced each other so that rules out options A & B. Option C is about the environment being destroyed, and that really has nothing to do with foreign influence.
This is what I found. Raindrops form when microscopic water droplets bump into each other in clouds. the more turbulent the clouds the bigger the raindrops get