They have big ears to better hear the predator.
cats have big ears because they need to hear if they are having a prey,an foe and such and they have big ears because they have good hearing and they need good hearing.
Fennecs have big ears to hear prey and predators. Blood also passes near the skin of the ears and cools down the fox.
Because they mostly fly at night. They use echolocation to find obstacles and prey. They use those big ears in the echolocation.
They rely on their keen senses of hearing and sight. Their ears are needed to detect the slightest upcoming threats or prey.
to hear their predators creeping up on them,to hear their prey
so they can hear hunters and get ready for battle and hear prey in deserts
The big tuft of fur on the ears of cracals help them hear well enough to accurately pinpoint their prey. They can hear birds and easily snatch them while in flight.
Polar bears have small harsh environment ears, not big ears. This is to help conserve heat in the they live.
The large ears help the animal to find prey and to avoid predators. They also act as radiators for heat and help the animal stay cooler.
A rabbit with small ears has small ears and a rabbit with big ears has big ears.
I personally think that animals have big ears because they can hear carefully like if a predator is sneaking up to it's prey then they would be able to escape. But, also, by Fennagirl: Because Noddy wouldn't pay the ransom.
Elephants have big ears.
African elephants have big ears, because they can cool themselves down, by waving their ears. They have big ears for communication
foxes are preditors and use their ears to catch prey