<span>Cro-magnons and Neanderthals were both humans but were different species of humans. Modern humans are descended from Cro-magnons but Neanderthals became extinct. Both existed during the same period of history. It is not known whether or not Cro-Magnons and Neanderthals interbred but it is a theory that Neanderthals became extinct from interbreeding with Cro-magnons and become "absorbed" by Cro-Magnons although I don't believe there is any genetic evidence to support this theory. Cro-Magnons resembled modern humans. Neanderthals had more sloped foreheads and larger ribcages and were stronger than Cro-Magnon. Cro-magnon had better tools, making the better hunters</span>
Maria Reynolds was abused by her husband and used as blackmail amongst wealthy individuals, Alexander may have been lured in by her, but ultimately he was the one how decided on the final action committed.
They were afraid of large numbers of Jews coming in from (in the case of the St. Louis) Germany. 900 people is a lot of people but it would only be the tip of the iceberg if people were allowed to cross the Atlantic and go into the United States. There was a quota of how many people could come in and the US wanted to keep to the quota system.
The United States (at the time of the St. Louis sailing) was neutral, so they also didn't want to endanger that neutrality.
As noted by the other Brainly user's response here, early Chinese civilization developed between the Yangtze River and the Huang He River (or Yellow River), because the plain between the rivers is fertile, allowing for the development of agriculture. It's also worth noting that the these two rivers extend for hundreds of miles from west to east before reaching the sea. This facilitated trade and transportation on the rivers. It also allowed Chinese rulers to maintain control and communication across the wide expanse of main Chinese territory.
Also worth noting would be the mountains and deserts and ocean that set China off from other lands. Large mountain ranges exist in the south and west regions of China -- such as the Himalayan Mountains, Kunlun Mountains, and Tianshan Mountains. The Gobi Desert sits in the northern part of China, and the Pacific Ocean is to the east. These various geographic features set China off from other lands, so that civilization there developed in its own unique ways, apart from outside influence.
