Is vancouver (in canada) or indonesia richer?

The larges lakes in the world are found in: asia europe north america south america

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

How does central place theory explain patterns in the size and distribution of cities?