Answer:
ok I LÒVE YOU TOO muah haha
The common noun here is "frog" as the only other noun, Many, is not a common noun - it's a proper noun.
"frog" here is the object of the sentence: it's the object of the verb "caught" of which the subject is Mary
Answer: Because they don't have five feet in the line or don't have an unstressed syllable followed by a stressed one like iambic pentameter requires.
Explanation: In poetry, an Iambic Pentameter is a metrical speech that has 5 feet on every line. A foot is a pair of syllables in which there is an unstressed syllable followed by a stressed one.
The lines "As wicked dew as e'er my mother brushed" and "With raven’s feather from unwholesome fen" follow the rules of iambic pentameter, while the line "Upon thy wicked dam, come forth!" has just four feet, and the line "Drop on you both! A southwest blow on ye" doesn't have the unstressed syllables at first.
The 3rd one is your correct answer. :3