Six rescuers cooperate to place an injured man on a transport device in snowy, mountainous terrain.
six people act together to get another, injured man on a transport in snowy terrain
Six rescuers can be called six people as they act together or cooperate to help injured man.
Six rescuers fall under six people category, cooperating means acting together as part of the total description in snowy (mountainous) terrain.
Six rescuers cooperate can be inferred as six people act together .