A) growth of human population.
B) evolution through natural selection.
C) advances in technology.
D) the increase of non-native species.
E) advances in medical care.

A) Medical practices
B) Agriculture
C) Sanitation methods
D) Both a and c
E) All of the above

A) Human populations worldwide are healthy and have plenty of food and clean water.
B) The effects of limiting factors that might stabilize populations have been reduced.
C) There is now more healthy food than ever before so larger human populations can be supported.
D) Advances lead to more resource consumption but human population growth does not negatively affect the environment.
E) Agricultural advances have led to more nutrition so that the world no longer has humans facing starvation.