Question

How do plant roots usually grow?
Plant roots usually grow deeper than the spread of the roots.
The spread of the roots around the plants is usually greater than the depth.
Plant roots will grow either deep or wide but not both. Plant roots are not edible.

Answer 1

plant root usually grow deeper because they grow deeper to take underwater.plant also spread itself because the roots will also want to get the water from its surrounding.

Answer 2

plants are usually grow because some plants get food from photosynthesis and take from xylem phloem