Genetic variation describes naturally occurring differences among individuals within the same population or species. It is based on the differences in the alleles in the gene pool in a population. These differences--

most community's take hundreds of years to become stable

answer: although many types of viruses can cause a common cold, rhinoviruses are the most common culprit. a cold virus enters your body through your mouth, eyes or nose. the virus can spread through droplets in the air when someone who is sick coughs, sneezes or talks. theres your answer

explanation:

the contamination

we are putting to many trash.