Answer: A. a poetic foot made up of an unstressed syllable followed by a stressed syllable.
Explanation: In poetry, an iamb is a foot or beat consisting of an unstressed syllable followed by a stressed syllable, or a short syllable followed by a long syllable, iambic foots were used in traditional traditional English poetry and verse drama. So, according to this information, the correct answer is the definition given by option A: a poetic foot made up of an unstressed syllable followed by a stressed syllable.
The subordinate clause is "unprotected animals got swept out" and the main clause is because "when waves rush in". hope u get it right ;)
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A paradox is a literary device that uses two opposing thoughts which may appear senseless, but turns out that it contains a kind of truth in it. A consonance is also a literary device by the repetition of consonant sounds within sentences, phrases or poems. From the given question above, the line that contains both paradox and consonance is option D: At least to know the worst is sweet.