Correct option is A
Idiom Meaning:
Under the weather - feeling slightly ill or unwell.
Explanation:
• It is commonly used to describe a condition where someone is sick or not feeling well.
Correct: I’m feeling a bit under the weather today, so I’ll skip work.
Option Meanings:
To feel unwell – not in good health.
To work against the weather – unrelated meaning.
To feel secure – opposite of unwell.
To enjoy the weather – unrelated.