1). Why were people able to say, "The sun never sets on the British Empire"?

A: People were able to this because the British Empire was so large and covered so many parts of the globe that it was always daylight somewhere in the empire.

2). Why do you think Britain built naval bases where it did?

A: I believe Britain built naval bases where it did because these locations enabled naval bases to function properly as these bases were mainly used for ports.

Your first answer is good. Your second answer is incomplete. Please keep looking.

). Why do you think Britain built naval bases where it did?

A: I believe Britain built naval bases where it did because these locations enabled naval bases to fulfill their purpose as these bases were mainly used as ports and overseas trade?

Why did the British choose those particular ports?

A: I believe Britain built naval bases where it did because these locations were located on coasts and enabled naval bases to fulfill their purpose as these bases were mainly used as ports and overseas trade?

Britain chose those particular ports because they were located on coasts?

A port must be located on a coast!!! Where else would it be?

Weren't these ports located in British colonies that were part of the Empire?

Yes.