DENDROLOGY

Detailed explanation-1: -The correct option is A trunk. The thickened stem of a tree that supports branches and has a woody outer bark is called the trunk of a tree.

Detailed explanation-2: -Trees are big, tall and strong plants. They have a thick, brown and woody stem called trunk. They have many branches that bear leaves, flowers and fruits. Their roots are thick and strong roots. Trees usually live for many years.

Detailed explanation-3: -We define woody stems as stems with secondary growth, i.e., having wood with a combination of living and non-living cells exterior to the cambium. Collectively, all the tissues beyond the cambium are known as bark.