C is not a property of metals
Answer:
B
Explanation:
If the frequency is doubled, the wavelength is only half as long.
If the wavelength Doubled, the frequency is reduced.
The answer for the first question would be water. It is the substance that is a compound since it is made up of different elements. For the second item, i think the best answer is phosphorus and nitrogen. They are the limiting nutrients. For the last item, the correct answer is reservoirs.
I believe the correct answer would be:
D. Nonmetals are nonconductors.
But please correct me if I'm wrong. Have a nice one!