Why do the polar bear and the sun bear have many similar traits? a. they live in similar environments. b. they evolved from a common ancestor. c. they are evolving into two separate species. d. they each have unique adaptations to survive.

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: