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).
Answer:
protein,carbohydrate,lipids,nucleic acid
Refers to the environmental capacity , as much of something it can hold
One of them is definitely hun
The sun provides the most energy in the ecosystem
