Answer:
Although people live in the desert, they are still limited by its harsh climate.
Step-by-step explanation:
An adverb is a part of speech that modifies a verb, adjective in a sentence by showing degree or frequency.
An adverb clause, on the other hand, are a group of words that are dependent clauses that need a conjunction to link them with the sentence. They can be placed at the beginning, middle, or end of a sentence.
So, the sentence Although people live in the desert, they are still limited by its harsh climate is an adverb clause.