DENDROLOGY

Detailed explanation-1: -In botany, the trunk (or bole) is the stem and main wooden axis of a tree, which is an important feature in tree identification, and which often differs markedly from the bottom of the trunk to the top, depending on the species. The trunk is the most important part of the tree for timber production.

Detailed explanation-2: -The trunk facilitates the movement of water and minerals up from the roots in the soil to the branches, stems and eventually to the leaves. The trunk also facilitates the movement of the sugar down from the leaves, stems and branches to the roots.

Detailed explanation-3: -Trunk is the woody stem present in trees. From the above options, coconut plant is an example of a tree and have a trunk.