Why do plants die if their roots are badly damaged? which root of the plant is called the main one?

1) Why do plants die if their roots are badly damaged? 2) which root of the plant is called the main one? How is it formed? 3) what is the difference between lateral and adventitious roots? 4) what is called the root system of a plant? 5) what is the difference between tap root systems and fibrous ones? Name plants with tap root systems and fibrous root systems. 6) Why does the yield of potatoes and tomatoes increase after hilling?

1) Because the roots are the main conductor in plant nutrition, ensuring the absorption of water, and its distribution in the stems and leaves.
2) The main root is called the one that first emerges in the seed and makes its way into the ground.
3) Lateral roots – originate and grow on the main and subordinate roots.
Accessory roots – grow on the stem, flowers, leaves.
4) The root system of plants is all the roots taken together.
5) Core root system – which has a well-developed main taproot and weak lateral roots (linden, clip, watermelon, rose).
A fibrous root system – which has many small roots, but lacks the main one (wheat, oats, lily, onions).
6) The soil is loosened, in this way more oxygen, nutrients, water enters, new roots grow.