Sharp teeth that are constantly replaced would be the answer! In order for it to be a specific adaptation you would need the detail of why the animal has that adaption for example fins for stability:)
Answer:
Observing changes in the nesting behavior of wood ducks should be conducted as a field investigation.
Explanation:
<span>This is continuous aerobic activity. While regular aerobic activity can incorporate rest periods, this style of activity does not. Activities such as walking, slow jogging, stair climbing, and swimming can all fit this definition, because they can be done without rest for long periods.</span>
Sorry but. Do your own school!