Homework What do you think is the best innovation in technology ever invented? Why? Tell you reasons in your answer. :) (hi)

I think the best innovation in technology ever invented is cell phone.
I can talk each other with it=We can talk to each other easily. I can also chat using message =chat or send messages. And I can download games and applications with =using the play store.
But I have to be careful not to use cell phone =a /  my cell phone SO MANY TIMES.