There Are 4 Valence Electrons So do the one with 4 valence electrons
Answer:
A. the digestive, muscular, and respiratory
Explanation:
Muscle weakness affects the muscular system (muscles are in the muscular system) , stomach pain affects the digestive system (stomach is a part of the digestive system), and coughing affects the respiratory system (coughing hinders the ability to breathe properly).
A macrophage is a large phagocytic cell that engulfs foreign particles and pathogens. So Macrophage.
Hope this help! :)
The answer would be C. It cant be A because thats the small intestant job not the large intestant. It cant be B because thats the pancreas job. And it cant be D because thats DNA job. So its just C. Hope this helped