Question

select the dependent clause. some farmers prefer organic fertilizers because they enrich the soil and are free of harmful chemicals.

Explanation:

A dependent clause is a group of words with a subject and a verb that cannot stand alone as a complete sentence. In the given sentence, "because they enrich the soil and are free of harmful chemicals" has a subject "they" and verbs "enrich" and "are", and it cannot stand alone as a sentence, relying on the main - clause "Some farmers prefer organic fertilizers".

Answer:

because they enrich the soil and are free of harmful chemicals