D, motion of tectonic plates
Your answer would be D) Stromatolites. hope this helps :)))!
Http://www.lcps.org/cms/lib4/va01000195/centricity/domain/4153/study%20guide%20-%20geography%20unit%201%20answer%20key.pdf
The correct answer is : D. Pleistocene epoch
The Pleistocene epoch lasted from about 2,500,000 years ago to 11,700 years ago. In this era, a lot of repeated glaciations happened on earth, since most of Earth's geographical surface is covered in Ice.
For the bottom section I think it goes C B A
