Answer:
1. tiene
2. tienen
3. tienen
4. tenemos
5. tiene
6. tengo
7. tienes
8. tenemos
Step-by-step explanation:
1. she/he/usted form because Elena (she) has many cousins
2. they/ustedes form because Their friends (they) have many classes
3. they/ustedes form because Ustedes have a pretty garden
4. we form because We have the same bicycle
5. he/she/usted form because Ella (she) "has" 15 years or she is 15 years old
6. yo/I form because I have a cat and two dogs
7. tú/you form because Do you have green eyes or blue eyes?
8. we form because Lolita y yo (we) "have" red hair or we are redheads