Help I got 2-3 hours and trying to get done​

7th grade question (easy) look at the diagram of the food web. the arrows mean eaten by. what would happen if the number of snakes went down? answer choices are in the image.

If the birth rate of a population of dolphins is 2.0, the death rate is 0.5, and the population size is 100, what is this dolphin's population growth?

Hurry where is the majority of earth's water found? o glaciers o oceans ground o rivers and lakes