I think it's the first and second option but I could be wrong because I don't know much about deserts :)
Answer:
I think answer is
-the waves transfer energy
<span>They are considered accessory glands of the digestive system because they only send digestive juices and acids to the main digestive organs. Food does not actually enter any of the accessory organs.</span>
Answer:
They digest without the use of teeth.
Explanation:
The food trickles from the crop into the bird's stomach (proventriculus or gizzard) where digestive enzymes are added to the mix and physical grinding of the food occurs. The gizzard is why chickens do not need teeth.
Usually under ground springs, or sometimes hollowed earth beneath solid earth where the water pools.
