Question

biostimulants affect plants by ______.
a. increasing the number of fibrous roots
b. stimulating growth
c. improving water uptake
d. all of the above

Explanation:

Biostimulants are substances that enhance plant growth and development. They can increase fibrous root numbers (aiding nutrient/water absorption), stimulate overall growth, and improve water uptake. So all options a, b, c are effects of biostimulants.

Answer:

d. all of the above