Afloodplain forms where a stream carries no bed load cuts mainly side to side rises above its base level cuts downward rapidly

A floodplain forms where a stream cuts mainly side to side. The correct option among all the options that are given in the question is the second option. These floodplains are very fertile and so great for cultivation of crops. Most of the ancient civilizations started beside floodplains as people could cultivate very easily and fulfill their needs.

The answer is 1-plate movement along fault lines

Answerbecause of improved transportation, communication, and other advantages;