How do you think the people learned to use the river float to their advantage

Rivers are our main source of clean drinking water, and their economic value, ... A river isn't only important to the animals who live in it, or the people who boat on it. ... Rafting, fishing, swimming, hiking and wildlife watching all draw people—and ... as crabs and as large as moose lose their ability to find food and reproduce.

Explanation:

all you have to do is look at the pictures to find hope this is the lesson you were also hope this .