Which is most likely cause of springtime flooding in a river valley? a. rapid snow melt in regions upstream b. erosion of the natural stream channel c. moderate rainfall in the region d. an increase in sediment load

A.  Rapid snow melt in regions upstream

Explanation:

"Rapid snow melt" in the upstream regions is most likely the cause of spring time flooding in a river valley. The effects of rapid snow melt are different for different areas. But in the upstream region it is a concern. In the spring time the rapid snow melting has become a cause of concern for many people around the world. But besides flooding snow melting can cause "landslides and debris flows" too. In the "alpine regions" like "Switzerland", snowmelt is a major cause for the runoff. Snow melting in such regions with the combination of rain can cause disastrous floods.

for e2020. the answer would be some directions from the mountain range so we can find mt. whitney. to locate which direction is north, you should use a   compass. this would not only find mt. whitney, but also becuase of this long paragraph you would get points because it's not like anyone actually reads your work becuase once they read the first sentence it sounds dumb enough to not read becuase i'm not good at answering this but the answer is compass for your benefit.

for e2020 ; -;