According to the online content encyclopedia article about maps, which kind of map is the most basic kind of map that can be used to find and describe places? A.
a thematic map
B.
a general reference map
C.
a mobility map
D.
an inventory map

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

Fossil fuels such as coal, oil, and natural gas were formed over millions of years by

Identify the youngest layer in the figure ( have to click one letter)