The roots are the parts of a plant that grow down into soil or water. Roots help hold the plant in place by anchoring it to the ground. They also draw up the water and minerals that the plant needs for growth. Some plants, such as beets, store food in their roots.When a plant begins to grow, the seed sends out a single root called the primary root. This soon branches out into secondary roots. Some plants have just one large root, called a taproot, with just a few fine roots sprouting off it. Others, such as grasses, have lots of fine roots that spread out in a dense mat. These are called fibrous roots.

What is the main idea of paragraph two?

​