The correct formal comand to fill the sentence is:
Imperative in Spanish.
The conjugation of the verb "ser" in imperative form, taking into account the personal pronouns is:
- Tú: sé
- Usted: sea
- Él: sea
- Ella: sea
- Ello: sea
- Nosotros / Nosotras: seamos
- Ustedes: sean
- Ellos / Ellas: sean
Since the formal command usually refers in the singular to the personal pronoun "usted," and taking into account the guide above, the proper conjugation is "sea."
If you want to learn more about Imperative in Spanish, you can visit the following link: https://brainly.com/question/3034212
