The trunk is the stem and main wooden axis of a tree. It is the wide central part of a tree, from which the branches grow. These are thick and brown in colour. The trunk is the most important part of the tree for timber production.

Plants are classified into different groups based on their growth habits. Trees, shrubs, herbs, creepers, and climbers are the different types of plants. Creepers are plants that have weak stems. They cannot stand upright, so they grow along the ground. They are generally considered to be small.

Plants are classified into different groups based on their growth habits Climbers are plants that cannot stand on their own as they have weak stems. They climb on other plants or take the support of sticks and walls to climb. Grapevine and the money plant are examples of climbers.