AP PSYCHOLOGY

Detailed explanation-1: -A species is said to be extinct when it no longer lives anywhere on the planet. Extinction occurs when the last members of a species die because they cannot acquire the food, water, shelter, and/or space necessary to survive.

Detailed explanation-2: -Extinction signifies the permanent loss of an organism from the planet. A “functionally extinct” organism is one that may have a few individuals still living but will never recover (think Martha the passenger pigeon or Lonesome George the Pinta Island tortoise).