What option best completes the following sentence? Motion is described with relation to a .

A
displacement

B
distance

C
frame of reference

D
graph

Correct answer is displacement. (A)

Explanation:

You can describe the motion of an object by its position, speed, direction, and acceleration. An object is moving if its position relative to a fixed point is changing. Even things that appear to be at rest move.

i'd say that the moon rock is about 2.2 billion years old.

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion