Which of the following factors would be a likely reason for low population density?
a) a harsh natural environment
b) being located by a harbor
c) having abundant natural wealth
d) low infant mortality rates

A harsh natural environment is a factor that directly influences population density. This is because for an organism to survive in a given area, the conditions or environment surrounding it needs to either be favourable or directly support it's existence. If the environment is harsh it is automatic that organisms will seek a more favourable area therefore creating a high population density where conditions support their existence.

Mexico has a host of environmental problems, including significant chemicalpollution  from factory discharges and waste dumping, but the main threat to itsbiodiversity  probably stems from  deforestation  and other natural habitat losses. forest habitat is lost for a number of reasons