Question

a population of organisms grows
only in the absence of predators or natural diseases.
when the birth rate exceeds the death rate.
with no natural restrictions except the availability of food.
when the resources are limited.

Explanation:

Population growth occurs when the number of new - born organisms is higher than the number of organisms that die. So, when the birth rate exceeds the death rate, the population grows. Predators and diseases are not the only factors affecting growth, and growth can occur even with their presence. Also, growth is restricted by multiple factors like space, not just food, and limited resources usually limit growth rather than cause it.

Answer:

when the birth rate exceeds the death rate.