We can actually deduce here that the reflexive verb is conjugated correctly.
What is a reflexive verb?
A reflexive verb refers to the situation whereby the subject and object of a sentence are the same. In other words, it's a verb which the direct object is same as the subject.
We can see here that "cepillarse" means "brush".
The sentence, "Es necesario cepillarse los dientes" actually means "You need to brush your teeth".
Thus, we see that the reflexive verb is conjugated correctly.
Learn more about reflexive verb on https://brainly.com/question/1669517
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