"10 points best answer" please help !!!!!?

[SilverS]

some questions im really stuck on

1. How does flapping its large ears help an african elephant to reduce its body temperature?

2. Explain how the size and shape of different part of the polar bears body help it to conserve heat

3. A shrew and an elephant in the hot african savannah both need to cool down. Which animal is likely to be more successful and why?

THANKS A LOT I APPRECIATE THIS x