Does caucasus mountain seperate european russia from asian russia

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

The largest internal organ in the frog is the

Asap will mark geography final plz ! what are the benefits of international aid? (give me the right evidence )