Final answer:
Intraspecific competition occurs when members of the same species compete with each other for resources, such as light, water, or food. One example is when two trees compete for sunlight and one grows taller than the other.
Step-by-step explanation:
Intraspecific competition happens when members of the same species compete for the same resources. For example, two trees may grow close together and compete for light. One may out-compete the other by growing taller to get more available light. As members of the same species are usually genetically different, they have different characteristics, and in this example, one tree grows taller than the other. The organism that is better adapted to that environment is better able to survive. The other organism may not survive. In this example, it is the taller tree that is better adapted to the environment.