Which detail best supports the author's opinion that Kalhat

is a secure city?

The correct answer that best supports the author's opinion that Kalhat is a secure city is "The Malik of Hormuz fears no one when he is in Kalhat".

Explanation:

In the excerpt, it was stated by the author that an important person like the Malik of Hormuz goes to Kalhat whenever he is "at war with neighbors more powerful than himself" because the city "is strongly built and situated".

That means, Malik feels strongly protected and secured from his enemies and fears no one whenever he is in Kalhat. As such, the author supports his opinion that Kalhat is a secure city.

If an important and influent character, like Malik of Hormuz can trust the safety of Kalhat, then the city is definitely secured.

Therefore, the correct answer from the excerpt that best supports the author's opinion about Kalhat's security is "The Malik of Hormuz fears no one when he is in Kalhat"