Which of the following is formed when a group of tissues works together to perform a common function?
a. brain
b. organ system
c. body
d. organ

D: Organ

Since it consist of multiple tissue that perform a function by working together

the oceanic zone is typically defined as the area of the ocean lying beyond the continental shelf, but operationally is often referred to as beginning where the water depths drop to below 100 meters (328 feet), seaward from the coast to the open ocean.

explanation:

equal distribution i think.