The document argues that bilingualism in Puerto Rico should be promoted for three key reasons. First, bilingualism heightens one's ability to monitor their environment by requiring keeping track of language changes. Second, learning a second language has a positive effect on intellectual growth and enhances children's mental development. Third, bilingualism strengthens executive functions like problem solving, mental flexibility, and attentional control that are important for cognitive processing. The document provides evidence from researchers and studies that bilingual individuals display advantages in these areas.