Answer:
The correct option is D. Thinning
Step-by-step explanation:
In biological studies, thinning can be described as a process in which certain kinds of trees are removed from a forest, in order to facilitate the growth and health of other trees.
For example, the eucalyptus tree is adapted to consume a lot of water. In a forest, such kind of tress cause water scarcity for other trees. The other trees will be competing for water. Hence, if some eucalyptus trees are removed, it can facilitate the growth of other trees.