State a problem. describe what you want to find out about the relationship of the following factors to the amount of water erosion that occurs on a slope

Explanation:

Water erosion happens when water takes away the rocks or separates and flattens the particles of a soil. ... Although the causes of water erosion are generally natural, man participates in it. The cause that most causes this type of erosion is the lack of vegetation.

he is very short, and he can only reach halfway up on the elevator buttons. but on a rainy day, he has his umbrella with him, and he uses it to poke the button at the top.

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.