Which of the following does functions as part of the excretory and respiratory system? a. blood b. heart c. intestines d. lungs

Pretty positive it is (D)Lungs.

I’m not sure what the excretory system is, but I know that out of all the options, the lungs are the only option part of the respiratory system. (The respiratory system consists of the nose, the pharynx, the trachea, the bronchus, the lungs, and the diaphragm). Hope this helps! :)

They probably don't understand either 1. what the nightmare is about or 2. his anxiety and stress