as the unit of predator increase , cooperation between bark will decrease
winter's_bark is bark. dogwood_trees has cottony_attachments_to_help_dispersal bark is animal_noise. friction is resistance. attenuation_of_barrier is weakening_event. if paw occurs then touch occurs. tree_bark is protective_system. tiger_sharks is predators. disarming_weapon is decreasing_level_of_dangerousness. bark is covering.