Question

Although rain had been predicted, the flag was still raised.

Answer 1

Answer: Although rain had been predicted

Explanation:

An adverb clause is also referred to as an adverbial clause and its function in a sentence is to act as an adverb that is, modify or qualify the adjectives, verbs, or the adverbs, that we have in the sentence.

The adverbial clause here is "Although rain had been predicted" which is an adverb clauses of concession.