Answer: The definition of competition is: D) a growing population causes a scarcity of resources.
Step-by-step explanation:
Competition refers to the struggle between individuals or populations for limited resources such as food, water, shelter, and mates. As populations grow, the demand for resources increases, and competition intensifies. This competition can lead to the selection of individuals with traits that enable them to better compete for resources, such as those who are stronger, faster, or more efficient at acquiring resources. Ultimately, competition plays a significant role in shaping the characteristics of populations over time, as those with advantageous traits are more likely to survive and reproduce.