if something causes something else to change, then that something affects that something else
another_way_to_say_separates_things is divides_objects. sending is causing. all_things has impact_on_other_things change_of_device_state is unnatural_thing. sometimes_change is good_thing. change is when_one_thing_becomes_another_thing. change is happening. change is relation. difference is change. change is thing.