The struggle between organisms for resources.

• A. Niche
• B. Predation
• C. Competition
• D. Symbiosis

Answer: (C)

Competition is the struggle between organisms for limited resources such as food, water, space, or mates. When resources are scarce, multiple individuals or species rely on the same resource, and their growth, survival, or reproduction can be affected as they vie for it. This interaction helps shape which organisms flourish in a given environment and can lead to outcomes like resource partitioning or competitive exclusion over time.

Niche refers to the role and set of resources a species uses in its environment, including where it lives and how it obtains what it needs, while predation is a relationship where one organism feeds on another, and symbiosis is a long-term close association that can be beneficial, neutral, or harmful. The statement focuses specifically on the struggle for shared resources, which is the essence of competition.