Many species of trees in the desert are seen to have long tap roots that grow very deep into the ground - sometimes as long as 2-3 times the tree's height. Which of the following is the MOST LIKELY reason for these long roots?
a. to allow the trees to store more food
b. to fix the tree firmly to the sand to withstand desert storms
c. to draw water from deep below the surface
d. to help the tree grow back if the part above the ground is destroyed