Explanation:

- Idiom: "Snowed under"

- This idiom refers to being overwhelmed or extremely busy with work or tasks.

- Option 1: Lazy

- Refers to someone who is unwilling to work or exert effort.

- Does not relate to the idiom, as it suggests a lack of activity.

- Option 2: Silent

- Implies being quiet or not speaking.

- This option is not connected to the idiom.

- Option 3: Calm

- Suggests being relaxed or not agitated.

- This does not convey the sense of being overwhelmed.

- Option 4: Busy

- Correctly aligns with "snowed under," suggesting being overburdened with work.

- Correct Answer