The correct answer is A....
"An example of mutualism in the rainforest is the pollination of the Durian tree by bats."
Okay we are gonna use A iPhone to a old telephone so the telephone can only receive calls and call other people that it but say with the iPhone you can call the person and receive calls you can text you can video chat you can get emails you can have apps to entertain you you can have pictures and music you can have a ringtone and and text tones