Es cierto que nosotros (a) recogemos la basura del parque.
The correct verb to complete the sentence is "recogemos," which is the first person plural form of the Spanish verb "recoger" in the present tense.
The verb "recoger" means "to pick up" or "to gather," and in this sentence, the subject is "nosotros" (we), and the sentence is talking about the action of picking up the trash from the park. Therefore, the correct verb to use is "recogemos," which means "we pick up" in English.