Which factors primarily influence an organism's niche?

The correct choice highlights that an organism's niche is primarily influenced by resource availability and environmental conditions. A niche encompasses the role an organism plays in its ecosystem, including its habitat, dietary preferences, and how it interacts with other organisms and its physical environment.

Resource availability refers to the food, water, shelter, and space that an organism needs to survive and reproduce. For example, a plant's niche is strongly determined by the amount of sunlight, soil quality, and water resources available to it. Environmental conditions, such as temperature, humidity, and climate, also play a significant role in shaping an organism's niche, affecting its distribution and adaptations.

Understanding the interaction between these factors is crucial for comprehending how species thrive in specific environments and how changes, like climate change or habitat alteration, can impact biodiversity.