Error in using the output of one function in another function (beginner)

[zivoni]

You are missing to store your choice to a variable (or use it directly). Your choice is returned by choice(), but you dont use its return value, you just call your response with its parameter being function choice, not returning value.

Use either

my_choice = choice()
response(my_choice)

or without using auxillary variable - return value of choice is passed directaly as a parameter to response:

response( choice() )