in grammatical accidents the number indicates the number of individuals that the noun speaks of, in this case it is speaking of more than one, therefore it must be combined in a plural way so that it has agreement with what is being expressed.
If it refers to a single individual, the singular number should be used.
escribe la forma correcta de las palabras. no olvides el acento escrito translates to write the correct form of the words. don't forget the written accent
