This image shows how a hydroelectric Powerplant can generate electricity. Which of these must be true for the power plant to produce electricity?

B. The water level downstream from the dam must be higher than the level of the reservoir

C. The water level at the intake opening must be lower than the level of the
outflow opening.

D. The water level in the reservoir must be higher than the level of the outflow
opening

i think it's c

the answer is :

1. amino acid refers to the fundamental building block of proteins, comprising of an amino group and a carboxyl group.

2. catalyst refers to any substance, which increases the rate of chemical reaction without being used up in the reaction.

3. a complex molecule containing he genetic code is dna or deoxyribonucleic acid.

4. an enzyme refers to a molecule of protein, which is unique in accelerating up a particular chemical reaction in the biological systems.

5. nucleic acid refers to an sequence of sugars, phosphates, and nitrogenous bases, for example, dna and rna.

6. a protein refers to a large, composite organic molecule comprising of a huge number of amino acids associated together with the of peptide bonds.

7. rna refers to a nucleic acid that takes part in the production of proteins.

8. substrate refers to a compound, which takes part in a chemical reaction, and is chemically modified by the reaction.

paper covers rock.

explanation:

rock only smashes scissors.