For number 17, the city with the highest polulation density is Tokyo. Most of Japan's people live there.
The 2 industries that dominate Hawaii are Agriculture and Manufacturing.
I know that mating produces offspring, and a effective dance attracts said mate, then I think the answer is D) offspring.
I hope this helps!
Pros: China had a major economic growth due to trading with other nations, other nations were not aloud to divide China into separate colonies
Cons: Chinese culture and traditions were lost, Opium was brought in which killed many people