Question

Aerial animals have light bones and toothless beaks.

Answer 1

Answer:

With hollow bones a bird can fly very long distances without getting worn out from carrying its own weight. ... These air sacs help the bird to get the oxygen it needs to fly quickly and easily. You might think these bones are fragile, like empty egg shells, but birds can't afford to have bones that break easily.

Answer 2

Explanation:

Five common abiotic factors are atmosphere, chemical elements, sunlight/temperature, wind and water.