Whats the process of creating an effective list of tasks to accomplish a goal

How can hind limbs be used to tell alligators and crocodiles apart? a. alligators have jagged fringe on their legs and feet, crocodiles do not. c. i don't want to get close enough to find out! b. crocodiles have jagged fringe on their legs and feet, alligators do not. d. alligators have webbed feet, crocodiles have individual toes