How Does a Tree work? Tree is of one of plants which thrive in the ground surface of the earth. Tree becomes the biggest plant than other plant. A tree has four major parts. They are root, trunk, leaves, and flower. The first part of the tree is root. A tree's roots are used to absorb the water and other nutrition from the soil in the ground. Most trees' roots are lateral which spread into smaller roots and extend horizontally beyond the end of branch. The second part is trunk or known as stem. This part sustains the crown of the tree and keeps the tree strong and standing. Trunks transfer the water and mineral from the root to other parts of tree. manakah kata sifat?​