How did the regular flooding of the huang he river contribute to the growth of an early civilization

They had more fresh water and less room for there enemy's

The  pan-african movement  was an "emotional, cultural, psychological and ideological  movement  that began among the  african  dispora in the western hemisphere, for a closer  purpose, so that  african  people could feel secure, attain political, economic as well as psychological power visa vis other races or world regions" .