Answer:
Aquellos.
Explanation:
Pronouns are words that help us to refer to the subject without mentioning it. In addition to personal pronouns, there are other types of words that also fulfill the function of pronouns, the demonstratives. Generally, pronouns appear alone in a phrase:
For example: Aquellos pesan mucho.
Here "aquellos" is a pronoun that refers to ideas that are not specified.
