Survival rates of newborns
Average life spans
Death rates
level of and access to medicare
Local diseases with high mortality rates (Malaria,AIDS,Dengue, ETC)
Education levels
Economic levels
Governmental programs or laws (available food) ECT
Temperature/environment conditions
The Sun is the energy source for almost all life on earth.
The one-leg stand test is something the cops do to people when they pull them over depending on the way that person was driving to tell whether you were under the influence of alcohol or drugs.
(Speaking from experience)#dontgetcaught
B) Genotypes are directly selected