Give me a summary on population growth

Two types of population growth patterns may occur depending on specific environmental conditions:

An exponential growth pattern (J curve) occurs in an ideal, unlimited environment.

A logistic growth pattern (S curve) occurs when environmental pressures slow the rate of growth. Two types of population growth patterns may occur depending on specific environmental conditions. Population growth is the increase in the number of individuals in a population. Global human population growth amounts to around 83 million annually, or 1.1% per year.Poverty is believed to be the leading cause of overpopulation. A lack of educational resources, coupled with high death rates leading to higher birth rates, result in impoverished areas seeing large booms in population.

Explanation:

they deliver oxygen to the blood

well, i believe that the answer is 2. : 3