What does the term 'pruning' refer to in tree care?

Pruning refers to the practice of removing unwanted branches from a tree to promote better health, growth, and shape. This technique allows for improved air circulation, increased light penetration, and helps to direct the tree's energy into the remaining branches, leading to more vigorous growth. Additionally, pruning can help prevent disease by removing dead or diseased branches and reducing the risk of pests. It is a critical maintenance practice in arboriculture that ensures trees remain healthy and aesthetically pleasing.

The other options do not accurately describe the concept of pruning: watering supports the tree's hydration, planting new trees refers to the introduction of new specimens in a landscape, and applying chemicals pertains to pest management, none of which involve the cutting away of branches.