Answer:
1. Tratenla amablemente.
2. Tienen que pedírselo.
3. No pueden contratarlo sin permiso.
4. Tienen que ponerla muy baja.
5. No deben servirselas a los menores de edad.
6. No pueden organizarlas nunca más.
Explanation:
It is called a direct object (in traditional grammar, direct complement) to the function played by a syntactic constituent (phrase, pronoun or a substantive subordinate proposition), different from the grammatical subject, which is necessarily required by a transitive verb
it is the person or object on which the action expressed by the verb falls, it is a modifier of the predicate. The direct object can be expressed by pronouns: lo, la, los, las. Substituting the direct object of a sentence for one of these pronouns is a recommended way to verify that it is indeed the direct object.
