The ancient chinese settlements along the huang he were not affected by cultural diffusion because they were
a.
isolated
b.
attacked
c.
conquered
d.
annexed

The ancient Chinese settlements along the Huang He were not affected by cultural diffusion because they were "isolated" which usually protected them from invasion as well. 

The sumerian empire worshipped a lot of natural aspects like wind. the impact on civilization was people abided by rules to avoid displeasing gods and it created a drive in people to be good. i hope this is what you were looking for, as this question was quite broad.