people die or leave to a different place
A low birth rate and environmental hazards are two things that can cause a population to decrease.
A low Birth Rate and environmental hazards are two things that can cause a population to decrease.
people die or leave to a different place
Death - especially war & disease.
By Genocide, and by war..
The biggest thing that can change a population is the availability of jobs in that are. 2 other things that can change the population of an area is what businesses are there and the crime rate.
The deathrate exceeds the birthrate.
Increase "Baby Boom"
When 2 things increase or decrease by the same proportion
The population of zoo plankton would decrease.
A decrease in the birth rate will cause a decrease in population over time.
Death and migration are factors that can decrease hare population.