I think the answer is c but I looked it up and got this: system or thing used as an example to follow or imitate.
Crystalline silica is a natural compound in the earth's crust and is a basic component of sand and granite. Silicosis is an incurable disease of the lungs caused by breathing crystalline silica dust. This dust can cause scar tissue to form in the lungs.
Answer:
because they need foodi think
Answer:
The heart and lungs contain cells that contain the same information but they do different specialized functions
Explanation:
