What is this a picture of?

a. the great ocean conveyor belt
b. the gulf steam
c. trade winds
d. coriolis effect

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

What part did glaciers play in forming the great lakes?

Which of the following is a way that advancements in technology improve humans' ability to measure air quality and protect human health?