C........................................................................................................
Answer:
Robert Hooke discovered the microscope I'm not sure about the others
Unlike freshwater fish, saltwater fish <span>often contain a lower concentration of salt than the water they live in.
so your answer is </span><span>A. often contain a lower concentration of salt than the water they live in.
hope that helps!!!!!</span>
I would say b, that would only make sense to me cause it couldn’t be your stomach or skeletal