What means population per areas such as number of people per square mile in state

“Population Density” would be the correct term for (example); 25,000 per square mile. It literally means, for every square mile about 25,000 people (example) live within the proximity of that square mile.
Hope this clarifies for you! :3

Answer (a) the itcz comes overhead for part of the year; i believe this is correct,plz check first; ///

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.