Hello!
The answer is:
Structural Adaptations:
- Thickness of fur coat
- Beak type
Behavioral Adaptations:
- Nocturnal nature
- Flocking
- Hibernation
Why?
Structural adaptations mean all the physical changes that species do in order to adapt to different conditions. Structural adaptations are thickness or fur coat, beak type, teeth type, movements, and others.
Behavioral adaptations mean all the behavioral changes that species do in order to adapt to different conditions/situations. Behavioral adaptations are: Hibernation, nocturnal nature, flocking, migration, birds calls, and others.
Have a nice day!