An idiom/phrase is given in bold. Following this

Solution

• I felt under the weather after walking in the rain without an umbrella. o This sentence is correct because "under the weather" is used to describe feeling unwell, which is a common outcome of being exposed to rain and cold. • II. He was under the weather all weekend because he caught a cold. o This is also a correct use of the idiom. A cold directly relates to feeling unwell, which is the meaning of "under the weather." • The ship sailed under the weather flag to warn other vessels. o This is an incorrect use of the idiom. "Under the weather" is not a maritime term and does not refer to a type of flag. This sentence is a literal interpretation of the words, while the phrase is an idiom with a figurative meaning.