The formation of the hypothesis of drought in cape town

Answer any resource, such as wood or solar energy, that can or will be replenished naturally in the course of time;

Why you put last one a? i think is b.

Its led to migrationits led to death 

The zhou dynasty (1046-256 bce) was the longest-lasting of china's dynasties. it followed the shang dynasty (c. 1600-1046 bce) and it finished when the army of the state of qin captured the city of chengzhou in 256 bce.