When we think about roots, one thing that comes to our mind is that healthy roots are what make the whole tree healthy and thus they provide the anchor which is needed to keep the plant in place. Similarly, roots are the lifeline of a plant where they take the nutrients from the soil and give it to the whole tree.
The roots can grow to any extent to save the plants, some of the roots images which I really like,
These roots show why it's important and how healthy roots can grow to that extent to keep the whole plant healthy.