The native population of the Spanish colonies declined rapidly between 1519 and 1605. Why did the native population decrease at such a drastic rate? Include at least three reasons in your explanation.

The native population of the Spanish colonies declined rapidly between 1519 and 1605. Why did the native population decrease at such a drastic rate? Include at least three reasons in your explanation. How did the Spanish government respond to the decline? Include the page number(s) where you found this information in your textbook.