The resources of a small forest area have become scarce. you might say this area has reached its
growth rate
carrying capacity
population density

carrying capacity

A carrying capacity of a region or ecosystem refers to the number of individuals of the population of species, an ecosystem can support on the basis of availability of resources like food, habitat and others. The resources of a small forest area have become scare, as the area has reached it's carrying capacity. As, those resources are utilized for the support of growing population, lack of resources cannot support population growth. Hence, area has reached to it's carrying capacity.

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

the answer is 303.15 or 303