Answer:
I believe the answer is They can warm up in winter and and keep cool in summer.
This is because thermostats are controlled by humans and will change the temperature in an enclosed area (usually houses). During the summer, people will usually keep their houses cool, and during the winter, people will usually keep their houses warm. Mammal's bodies can helps keep cool in the summer and can help keep warm in the winter. This is their similarity.
hope this helps