As a member of the Committee of Five (the committee that drafted the Declaration of Independence which was comprised by Benjamin Franklin, John Adams, Robert Livingston, and Thomas Jefferson) , he helped draft the Declaration of Independence of the United States of America.
I believe it was Frederick Douglass.
Answer: Parallax
Explanation: Parallax is usually an error which should be avoided when taking measurements. It is the observed difference in the apparent position of an object when viewed from different positions. Motion parallax is the change in the position of an object due to the viewer's movement. In motion parallax, the object distance to the observer's eye seems to affect the relative motion of the object. That is objects close by or near the observer's eye such as mile markers seems to rush or whiz past relative to the observer's direction while distant objects such as hills and mountain tops moves relatively slowly in the opposite direction.