Choose the option in which the underlined clause in each of the following sentences has been correctly identified:

Kamal helped me as he is a dear friend.

Correct option is C

“As he is a dear friend” gives a reason for the action, modifying the verb “helped.” Adverb clauses answer questions like why, where, how, when.
​
Information Booster

An adverb clause provides context, such as cause, reason, manner, time, or condition, for the verb in the principal clause.

Additional Knowledge

Not noun or adjective clause.

Not principal, since it does not express the central idea but gives cause.