When does cultural diffusion happen

 It happens when another culture shared their beliefs with a different culture.

Explanation:

Cultural diffusion is when something from one area or culture spreads to another area or culture regardless of its location or climate zone. As more cultures come into contact with each other, more ideas and products spread and are shared.

nothing certain is known about what happened, but it seems that the country declined gradually, perhaps due to bad government, or, more likely, due to a series of bad harvests, which resulted in widespread and recurrent famine.

what the first or next guy says