Answer:
A
Sound waves radiate outward from a central point.
A cellular membrane separates the interior of all cells from the outside environment.
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.
The answer if or question would be question 2
No because your body does not sense that it is in danger from the pathogen
