According to a source the answer is <span><u>Cyanobacteria were the first organisms to produce oxygen in water, which then escaped into the atmosphere.</u>
These cyanobacteria species were the first ones to "produce" oxygen as a by-product of the photosynthetic mechanisms which enables organisms to make their own food. </span>
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The answer is B. the policy holder When you sign up for an insurance policy, your insurer will charge you a premium. This is the amount you pay for the policy or the total cost of your insurance. Policyholders may choose from a number of options for paying their insurance premiums.
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