Él tiene que correr. (He has to run.)
Ella tiene que ejercitarse. (She has to exercise.)
How to explain
Ella tiene que soplar su pastel de cumpleaños. (She has to blow out her birthday cake.)
Ellos tienen que comer. (They have to eat.)
Ellos tienen que tomar el autobús. (They have to take the bus.)
Él tiene que tomar agua. (He has to drink water.)
These sentences use "tener que" to express obligations or necessities related to the actions described by the given verbs. However, the connection between these sentences and the initial request about describing people from drawings isn't apparent.
If you could provide more context or clarify the connection, I'd be glad to assist further.