OBJECTIVE FORESTRY

Detailed explanation-1: -A: The outer bark is the tree’s protection from the outside world. Continually renewed from within, it helps keep out moisture in the rain, and prevents the tree from losing moisture when the air is dry. It insulates against cold and heat and wards off insect enemies.

Detailed explanation-2: -The protective outer covering of branches and stems that arises from the cork cambium.

Detailed explanation-3: -The cambium cell layer is the growing part of the trunk. It annually produces new bark and new wood in response to hormones that pass down through the phloem with food from the leaves.