Alveoli are found in lungs and exchamge O2 and Co2 !!
so answer is last one !!
Prey or predation is a biological interaction where a predator (an organism, often an animal) kills and eats its prey (another organism).
Like a mouse getting caught and eaten by a bird of prey (Eagles, hawks, etc.)
The scientific study of the biological aspects of social behavior in animals or humans! Hope this helped.
