Correct Answer: confined

Solution : The correct choice is the first option .

The underlined word unleashed means to release, set free, or initiate something powerful or intense. In this case, the antonym for "unleashed" would be confined, which indicates restricting or limiting something.

The meanings of the other words are follows:

• Regarded : It refers to the act of considering or thinking about someone or something in a particular way.
• Free : This indicates having the liberty, freedom, or independence to act, speak, or move without any restrictions or constraints.
• Unchained : This refers to the action of setting free or releasing something that was physically or metaphorically bound by chains or restraints.

Therefore, the most appropriate antonym of the given word is confined .