how do wetlands form?\ntributaries flow into rivers.\nrunoff travels down the side of a divide.\nwater…

Brief Explanations:

Wetlands form when water accumulates in an area. Ground - water coming to the surface and flooding the land can create a wetland environment. Water building up in a depression left by an ice - sheet can also lead to wetland formation as it creates an area saturated with water. Tributaries flowing into rivers and runoff traveling down the side of a divide are more related to surface water movement in river systems rather than direct wetland formation.

Answer:

C. Water builds up in a depression left by an ice sheet, D. Groundwater comes to the surface and floods the land