Help me pls pls pls 30 points on the line for who get it correct and brainlist it is 6th grade science it not college I might put it in the wrong subject so yea help pls :)

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

Where does oxidative phosphorylation take place

How do convection currents form underwater mountains?