Answer:
B is your answer!!!
No specific explanation...
HOPE THIS HELPS!
B- maintaining a stable internal environment.
Answer:
Changes in the environment affect the food sources available for birds. For example, if a flood was to occur, there would be an abundance of fish to birds to eat. So birds with bigger beaks will be able to eat fish, to live and reproduce offspring with bigger beaks. While birds with smaller beaks will not be able to catch fish to eat, therefore decreasing the population of birds with smaller beaks.
<span>This would be the Atlantic Ocean, mainly the northern reaches of it toward the Arctic. Vikings have their ancestry in the Norse countries and areas of northern Europe, which lies on the outskirts and seas bordering the Atlantic. During their travels, they would explore these waters and find new lands (one being the New World later discovered by Spanish, Portuguese, and English explorers some 500 years in the future).</span>