Explain what a buffer colonyb is

A buffer colony - like Georgia, for example - was founded because colonists wanted a "buffer zone" (any area that serves the purpose of keeping two or more other areas distant from one another.) between the British colonies and other settlements. Georgia, specifically, was founded to protect South Carolina against attack by the Spanish, the French and the Indians.  

Explanation:

the branch of biology that deals with the normal functions of living organisms and their parts.

the way in which a living organism or bodily part functions.