Correct option is B
Option (b) is the correct synonym of the given word.
Abound means to exist in large numbers or to be present in great quantities.
Synonyms : proliferate, teem, overflow, flourish, thrive.
Antonyms : dwindle, decrease, diminish, wane, deplete.
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Meanings of all options:
· Increase: To make or become larger or greater in quantity, degree, or intensity.
· Flourish: To thrive, grow well, or prosper vigorously.
· Succeed: To achieve a desired outcome or attain a goal; to prosper or thrive.
· Adequate: Sufficient in quantity or quality; enough to meet a need or requirement.