B. Crystalline structure
C. Types of chemical elements
And
D. Amounts of chemical elements
I believe passive transport is a form of diffusion. And it doesn't require any energy unlike active transport.
Answer: in the production systems of coal-burning power plants
Answer: Experiment.
Explanation:
Suppose that we have two related variables, A (independent) and B (dependent)
We could design an experiment where we can manipulate the value of A at will, and we also can observe how the variable B changes.
This is called an experiment, where the objective is to see how the variable B is related to the variable A, and then try to make a model that explains this relationship.
