Answer:
Los niños corren en el parque
Step-by-step explanation:
Translation:
Children run in the park
The verb "run" comes from the conjugation of the verb in infinite "run." "Run" is conjugated in the third person by referring to the children and in the present, since the children perform the activity at that time.
Unlike English, in Spanish when referring to the third person in the present tense if there is a change during the conjugation of the verb in infinitive. In this way the verb "correr" (infinitive) changes to "corren", that is, change the "r" to "n".