I need help with this please

What is an appropriate response to ¿cuál es tu número de teléfono?

The teacher didn't explain this at all and i don't understand this

"in english, write six to eight sentences comparing cultural aspects of greetings in spanish-speaking countries with greetings in your own culture. use what you learned in the lessons to tell about three differences and three similarities. discuss non-verbal greetings and how respect is shown. you may also include verbal greetings, but do not simply translate phrases from one language to another."