Final answer:
Natural selection is a process where traits that offer an advantage are more likely to be passed on. Intraspecific competition, competition between members of the same species, plays a role in natural selection.
Step-by-step explanation:
Natural selection is a process where traits that offer an advantage to an organism are more likely to be passed on to offspring.
This leads to the evolution of better adaptations within a species.
Intraspecific competition, competition between members of the same species, is a fundamental factor in natural selection.
For example, two male birds of the same species might compete for mates, leading to the evolution of traits that make one bird more successful in securing a mate.