How do rivers become larger as they travel across land?
1. Groundwater rises, adding water to rivers.
2. Tributaries combine, adding water to rivers.
3. Ice sheets melt slowly, adding water to rivers.
4. Rainfall in an area increases, adding water to rivers.

answer: 4,1 and 2

Explanation:

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

"a.) well–developed vascular system."