How is historical causation similar to correlation

Both involve events that are result of the same stimulus. Both involve events that occur during the same historical period

2686-2181 bce-- "egyptian civilization developed along the nile river in large part because the river’s annual flooding ensured reliable, rich soil for growing crops."

1069-664 bce-- "ancient egyptians developed wide-reaching trade networks along the nile, in the red sea, and in the near east."

an economic reason that the south needed a reconstruction plan is that plantations, factories, and other businesses were destroyed during the war.