Correct Answer: Turbulent

Solution : The correct choice is the first option .

Calm is a state of tranquilly, serenity, or absence of disturbance. Turbulent describes a state of disturbance, unrest, or violent activity, making it the correct antonym.

The meanings of the other options are as follows:

• Shocked refers to a state of surprise or disbelief.
• Variable suggests variability or changeability.
• Confused refers to a state of bewilderment or lack of understanding.

Therefore, the correct answer is turbulent.