Which of the following best explains why deforestation increases the risk of floods in an area?
a. tree leaves catch and retain rain water.
b. trees block the free flow of water.
c. deforestation increases precipitation.
d. tree roots improve soil water retention.

The choice that best explains why deforestation increases the risk of floods in an area is letter D: Tree roots improve soil water retention. Tree roots’ function is to absorb the water from the soil because it uses this water as his food to sustain its plant functions.