Question

the action or practice of inhaling and exhaling the vapor produced by an electronic cigarette or similar device.
○ vaping
○ dragging
○ smoking
○ inhaling

Explanation:

The definition describes the act of using electronic cigarettes to inhale/exhale vapor, which is specifically termed "vaping". "Dragging" is not a standard term for this, "smoking" refers to burning tobacco, and "inhaling" is only part of the action, not the full practice.

Answer:

A. Vaping