Which of these is an advantage of hydropower?
a
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a. it is expensive to build and maintain.
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b. it has high power-plant efficiency.
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c. it harms aquatic organisms.
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d. it is available only in limited areas.
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B. IT IS A HIGH POWER PLANT EFFIENCY

It has a long power-plant life span.

Explanation:

for the people whos apex is different then others

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called