Why is it necessary to preserve wetlands?

Which property of soil depends on the size of particles? color odor temperature texture

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

Select the natural regions. delta denver forest georgia north america plateau stream