Nancy notices that when she plays fetch with her dog at the park, her dog breathes more rapidly. She also notices during these times that the dogs wet tongue sticks out.

c

explanation:

c

in 550 b.c.e. cyrus the great, the leader of the persians, conquered the medes and united the iranian people under one ruler for the first time. cyrus became the first king of the persian empire and went on to establish one of the largest empires in world.

disease was the number one killer of native peoples. they had had little exposure to the diseases of europe. this led to some villages being almost completely wiped out and some tribes destroyed.