Which factors are involved in earthquake formation? Select three options.

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

Which of the following east asian contries are a peninsula? a. china b. taiwan c. south korea d. mongolia

The ozone hole is at its biggest each year in the ? hemisphere in the ? season.