Read the text again and identify the parts of a tree.

All about Plants

    Well, students. Today, I'm going to talk about plants. I'd like to divide my talk into two parts. The first part will be about trees and the second will be about flowering plants. Let's begin with trees. A tree consists of three main parts: the crown or canopy, trunk, and roots.

    The crown or the canopy is at the top of a tree. It filters dust and other particles from the air. It consists of leaves, branches, and twigs. As you all know, the leaves are the food factories of a tree. They contain chlorophyll which helps the photosynthesis process and gives green color to the leaves.

    Now, let's talk about trunk or stem. The trunk of a tree supports the crown and gives the tree its shape and strength. The trunk consists of several layers. The layers carry water and minerals up from the roots to the leaves and they carry sugar down from the leaves to the branches, trunk, and roots.

    What about roots? Roots absorb water and nutrients from the soil, store sugar, and hold the tree upright in the ground. Roots also have a lot of branches. Some roots can go down more than four meters! Now look at this chart and after a break, I will continue with flowering plants.

It plays an important role in photosynthesis. ____