12) Which is NOT a reason why the Eiffel tower is important?

B.

Explanation:

A dependent clause is a clause that has a subject and a verb but can not convey the message alone.

Whereas a phrase is a group of words without a subject and a verb.

In the given example, "When he was like that" is a dependent clause as it has a subject i.e., 'He', and a verb also i.e., 'was', but this clause alone does not make any complete sense.

So, the correct answer is option B.