Answer:
Movement of plates bring changes in the physical features of the earth surface in the following ways.
1) When the earth plates move, formation of ocean occurs.
2) Continents are also the product of plates movement. Earthquake is also caused by plates movement inside the earth.
3) Mountain also formed due to the movement of plates. Volcanic eruptions also occurs due to plates.
A sample is a random, unbiased selection out of a larger group. An independent variable is one that is changed as to see how it will affect the dependent variable in an experiment.
Hope that helped.
