In most natural populations rapid exponential growth is unsustainable. As populations increase, environmental resistance causes the growth rate to slow down, until carrying capacity is reached. List 3 factors that could be considered as environmental resistance.

Environmental resistance factors are things that limit the growth of a population. They include biotic factors - like predators, disease, competition, and lack of food - as well as abiotic factors - like fire, flood, and drought. The biotic potential of a population is how well a species is able to survive.

And climatic

Explanation:

the things that keep a population of organisms from endlessly increasing. They lower the chances for reproduction, affect the health of organisms, and raise the death rate in the population. Environmental resistance factors include factors that are biotic (living) and abiotic (non-living). Biotic factors are things like predation, parasitism, lack of food, competition with other organisms and disease. Abiotic factors include drought, fire, temperature, and even the wrong amount of sunshine. You can see how all these things, biotic and abiotic, would become an uphill battle to your boulder-pushing.

Environmental resistance is the factor that affects the growth, stability, and decline of a population. When a population experiences an increase in births and a decline in the mortality rate, overpopulation occurs. This is one of the most serious environmental issues of today that remains unsolved. Our increasing numbers are causing myriad problems from loss of freshwater to extinction of species to lowered life expectancy in developing countries. Surprisingly, overpopulation is also greatly observed in poverty-stricken areas.

not sure if this is what you'r looking for eubacteria and archaebacteria