If its a mutiple choice question ya got then VITAMINS should be the answer
The answer to the question stated above is non-disjunction.
It's an important part of the bird's ability to maintain its body temperature.
Air is a poor conductor of heat, so the air trapped among the feathers
prevents the loss of heat in cold atmosphere, and prevents overheating
in hot atmosphere. Much like our wearing several layers of clothing.
Region A, Hope this helps.
Answer:
B. Sea levels will rise , causing floods