Under the DSM-5, there are eight types of substance use disorders that doctors can diagnose. Caffeine is also listed as a substance-related disorder under DSM-5, however, it is not designated as a substance use disorder.2. Alcohol.
adverbs answer the questions-how ,why,when and where.ie,adverb of manner,adverb of purpose and reason,adverb of time and adverb of place.
The answer adjective clause is not correct. Explanation: This clause answers the question why, showing cause, so it is an adverb clause. It does not act as a subject or object, and it does not modify a noun or pronoun.