Final answer:
Birds, squirrels, and chipmunks in the same tree compete for resources such as food and nesting space, exhibiting interspecific competition. They coexist through resource partitioning, utilizing different resources or areas to minimize conflict.
Step-by-step explanation:
Birds, squirrels, and chipmunks all living in the same tree and using the same resources are an example of various species sharing habitat and competing for the same resources such as food, water, and nesting space. This situation often leads to what biologists call interspecific competition, which is competition between members of different species for limited resources. These species coexist in the same habitat by minimizing direct competition through mechanisms such as resource partitioning, which could involve using different resources, areas, or even feeding at different times to reduce direct conflict over resources.