He concluded that the world's population increase was higher than the development of food supplies.

He concluded that crude birth rates must balance crude death rates.

He concluded that population increased arithmetically while food production increased linguistically.

He concluded that population growth was outpacing available resources in every country, according to algebraic calculations.

stage 1

stage 2

stage 3

stage 4

places that are too hot

places that are too cold 

places that are too high in elevation

All the answers are correct

total increase rate

total fertility rate

crude fertility rate

crude birth rate

that the less developed countries have the highest combined crude death rate

that the most rapid growth is occurring in the less developed countries

that people are uniformly distributed across Earth

that the natural increase rate is larger every year