Answer:
The correct answer is:
Antes de empezar tu texto de comparación, es importante seleccionar un tema.
Step-by-step 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.