What causes the storm to start to spin in the way characteristic of hurricanes?

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

Asap! ! ! ! true or false the gobi desert, the largest desert in asia. covers parts of northern china and southern russia

How do you think the different landforms of northern and southern europe would affect ways of life in those two areas