Explanation: CDC works 24/7 to protect America from health, safety and security threats, both foreign and in the U.S. Whether diseases start at home or abroad, are chronic or acute, curable or preventable, human error or deliberate attack, CDC fights disease and supports communities and citizens to do the same.
Answer:
O. They use bicycle parts to build their plane.
O. Their plane uses runners on a track to gain speed for take-off.
Explanation:
The two statements above is the showing the fact about the two things which the Orville and Wilbur brothers did differently that when they are building their plane. <em>This was what contributed towards their success when compare with others who attempted similar things.</em>
the tone is poetry and how the person is leaving it home