The interior of long bones is filled with yellow bone marrow, which consists mostly of a. nervous tissue. b. energy-storing fat. c. red blood cells. d. platelets.

I believe the answer is b.

Social behavior refers to the interaction exhibited among two or more organisms of the same specie. Benefits of social behaviour include the following:1. It offers protection. Many animals live together in groups in order to secure protection for themselves.2. It heightened the success of obtain food. Previous studies have shown that many animals are successful in searching for food if they search in groups. 3. Some animals travel in groups in order to make travel easier and also to protect themselves from predators.