Answer:
Homeopathic medicine isn't sold in supermarkets.
Step-by-step explanation:
The passive voice is that form of writing and grammatical organization of a sentence, in which the subject of the sentence is not the one who guides the order of the writing of the text, but it is the object of the sentence who does it, reversing the usual order of sentences. Thus, the passive voice focuses on the object instead of the subject, giving a grammatical predominance to that on which the verb falls, instead of the person who performs the action of the verb.