if a living thing requires something for a process then that living thing uses that something for that process
living_organism is living_thing. living_thing is not tangible_thing. humans is living_things. living_thing is whole. life is living_thing. living_thing is living_or_fictional_thing. organism is living_thing. aerobic_thing is living_thing. living_thing is tangible_thing. organism_part is living_thing.