6. Several scientists observe an animal with hair and wings. This animal is a
A) bat.
B) bird.
C) butterfly
D) flying squirrel.

A. Bat

Explanation:

Bats have hair and wings. They are flying mammals.

If you are confused why the answer is not flying squirrels, that's because flying squirrels don't have wings and can't fly. They can only glide using skin flaps which don't count as wings.

the mongolian invasion of china and central asia resulted in a disruption of the silk road as the chinese garrisons lost support from the chinese kingdoms which fell under the mongols. however, as the mongols established a formal dynasty in china, the successors of genghis khan restored the garrisons along the silk road allowing the safe travel caravans again.

a phrase from a poem by ralph waldo emerson about the battle of lexington and concord. emerson's words read, “here once the embattled farmers stood / and fired the shot heard round the world.”