What did scientists believe caused the richat structure when it was viewed from space by the first astronauts? what do scientist now believe created this landform?

First, it was thought that it was the result of a meteor impact, but today it´s believed to have been caused by a process of geological uplift and later erosion from wind and water.

Explanation:

Also known as the Eye of Africa, the Richat structure is located in Mauritania. It´s composed of concentric bands that are made of resistant quartzite rocks form ridges, and valleys of less-resistant rock.

It has a diameter of 50 km and is one of the geological formations that are better perceived from space than from the ground, and it was a recognisable landmark to astronauts since their first missions.

no statements but ok.

the statement that best describes the idea of manifest destiny that was used in the 19th century would be that "it was fate that the united states would continue to  expand westward," since people thought the us was "destined" to do so. 

the fundamental orders of connecticut it would be the letter b