Antes de empezar tu texto de comparación, es importante
seleccionar un tema
incluir las fuentes
corregir los errores
escribir el cuerpo

The correct answer is:

seleccionar un tema.

Antes de empezar tu texto de comparación, es importante seleccionar un tema.

Explanation:

The options mean:

seleccionar un tema  (select a subject)incluir las fuentes  (include reference)corregir los errores  (correct possible mistakes)escribir el cuerpo (write the main idea)

The sentence says: what you should do when you are about to write a comparison type of text.

First, you have to select the subject that your are to write about.

For this question, it will be important to use the words "mejor" (better), "lo mejor" (the best), and "lo peor" (the worst). while "mejor" is comparative (you are comparing one thing to something else), "lo mejor" and "lo peor" are superlative (there is nothing else better or worse than what these words are describing - there is no comparison).  you could say something like: la música rap es mejor que la música clásica - que es lo peor - pero la música rock es lo mejor de todas las formas de la música (rap music is better than classical music - which is the worst - but rock music is the best out of all the forms of music).

Wait what this is werid