Identify the line of defense in the situation below. tracy suffered from chicken pox in her childhood. at the age of 25, she gets it again. however, this time she recovers with minimal treatment or medication. this was possible due to the cells produced by the immune response.

Which of the following statements best describes the relationship between the environment and the collective health of the world? a. the environment does not affect our health. b. when the environment is damaged, our health improves. c. what is good for the environment is good for our health. d. our collective health is not related to the health of the environment.