Which organ system is found in both animals and plants?
a. immune system
b. circulatory system
c. digestive system
d. skeletal system

The correct answer would be b. circulatory system.

In animals, the circulatory system consists of heart and blood vessels. It primarily circulates oxygen and nutrients throughout the body and also helps in removing metabolic waste such as carbon dioxide from the body.

In plants, the circulatory system consists of xylem and phloem. Xylem helps in transporting water and minerals from roots to the leaves. Phloem helps in circulating food from leaves to other parts of the plants.

an adaptation is a change or process by which an organism takes to be better suited for its environment. for example; migration is a behavioral adaptation, this is needed because birds are not built to last extremely cold climates. there are different adaptations because there are different species needing to adjust to different things, bears don't migrate; they hibernate.