Answer:
Explanation:
Secondary energy resources are those which do not occur naturally but which are obtained from one or more of the primary energy resources. Example: Petrol or gasoline, electrical energy from coal burning, hydrogen obtained by electrolysis of water etc. Non-commercial source of energy: Firewood, cow dung , and vegetable wastes.
It is trying to reach equilibrium, no net gain or loss.
If you mean the scientific method it is
make an observation
form a question
form a hypothesis
conduct an experiment
make a conclusion
It’s the second one I believe:)
Ur answer is A. cannot be studied, as they cannot be sampled and grown in the lab.
