During a fierce storm a large number of tall trees on a island are uprooted by the wind and die most of the trees on the islands are now short trees and produce seeds that grow into short trees what concept is shown in this example

Natural Selection

Explanation:

In all the three options namely Artificial Selection , Genetic Engineering  and Gene Splicing  there is involvement of human beings in gene modification. While in the case of natural selection genetic modification occurs through the evolutionary process through several hierarchical orders.