Geography is important for maps, knowing the way the land looks, is shaped, what the land is like, etc.
<span>Much of the commercially important waterways of the United States consist of the Mississippi River System—the Mississippi River and connecting waterways. .... States on the Gulf Coast and throughout the Midwest and Ohio Valley ...</span>
The Democratic Republic of the Congo (DRC) (About this soundpronunciation (help·info) French: République démocratique du Congo (RDC)), also known as Congo-Kinshasa, DR Congo (French: RD Congo), the DROC,[6] or simply either Congo or the Congo, and historically Zaire, is a country in Central Africa. It is, by area, the largest country in sub-Saharan Africa, the second-largest in all of Africa (after Algeria), and the 11th-largest in the world. With a population of over 101 million, the Democratic Republic of the Congo is the most-populous officially Francophone country in the world, as well as the 2nd-most populous country in Africa (after Nigeria), and the 13th-most populous country in the world. Since 2015, the Eastern DR Congo has been the scene of an ongoing military conflict in Kivu.
I would say D the Billingsella Corrugata, it IS in the oldest recorded time line, so by theory, it's the oldest (Don't quote me on that, I'm not %100)