Which river flows southward through southeast asia into south china sea?

What makes a personal exceptionality/non-exceptionality

In a economy individuals answer the three basic and the central authority or leaders have little say in the economy.

One of the main reasons societies settled along rivers in the neolithic era was because a) the village elders demanded it. b) the land there was more valuable. c) it was more safe and secure there. d) it provided irrigation for farming.