The theory of plate states that the earth’s crust is made up of many moving plates.
a.
drift
b.
activity
c.
motion
d.
tectonics

The country in the world with the largest population is_?

The difference(s) between the grand canyon and valles marineris is/are: (a) the grand canyon was formed by water, but valles marineris was not. (a) valles marineris is much longer than the grand canyon. (c) valles marineris is much wider than the grand canyon. (d) valles marineris has large volcanoes near it. all of the above

What are the answers for the following questions?