A population with a growth rate equal to zero is

A population with a growth rate equal to zero is unchanging (zero population growth)

Explanation:

Zero population growth can be described as a scenario in which the number of death rates in a country is equal to the birth rate of a country. As the population of countries is increasing enormously, many countries or sociologists consider zero population growth to be the social aim of society. This is because if the death rate and birth rate are not maintained, then this can lead to serious critical situations for a country.

they can increase to boost the enonomy.

the invasive species was introduced due to commercial purpouses, as there was a demand for fur clothes and hence, a business opportunity connected to this product. actually, it was when the nutrias scaped, causing harm to the us ecosystems when they acquired the status of invasive species. in this case they have caused an environmental problem, but it could have affected also economic interests or even human health.