Answer: The right answers are:
1. trae
2. tienen
3. salen
Explanation: Just to elaborate a little on the answer, it can be added that in this exercise they are asking you to select the right form of the present tense of the verbs, according to the subject of the sentence. In the first sentence, the subject is the third person singular (she/ella), so you must select the form trae. Traes and traigo refer to the second and first person singular, respectively. Trai is incorrect; the right form is traje. In the second sentence, the subject is the second personal plural (you/ustedes or vosotros), so you must select tienen. Tienes, tiene, and tenemos refer to the second person singular, the first person singular, and the first person plural, respectively. Finally, in the third sentence the subject is the third person plural (they/ellas), so you must select the form salen—vienen would be valid too, but they are asking you to conjugate the verb salir (to go out). Viene and sale refer to the third person singular.
