The correct answer is: [C]: "the rain" .
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Answer:

Cost : The expenditure incurred by a producer on the factor as well as non-factor inputs for a given amount of output of a commodity.
Viruses that lie dormant host cells until ready to multiply use the lytic cycle for reproduction
Bond covalent. monomers are joined together by a dehydration reaction in which two molecules are covalently bonded to each other through the loss of a water molecule