(answer quickly! )
why did the native population decrease in the spanish colonies that were established in the americas? include at least three reasons.

1. The Indians became slaves, they were forced to work long hours for the new colonial masters in terrible conditions and were often treated with cruelty.

2. The Spanish brought with them new diseases for which the natives didn´t have any antibodies, so epidemies killed millions of people in the 16th century.

3. Numerous Indian populations were outrightly destroyed,  annihilated by the Spanish military during the conquest, for their resistance, during wars.

Explanation:

answer: in 1900, there were no "workplace safety laws"!

explanation: at the beginning of this century, workers in the united states faced remarkably high health and safety risks on the job.

a century ago in 1900 about three hundred out of every one hundred thousand miners were killed on the job each year.

[industria] developments occurred within a legal and regulatory climate that diminished employer’s interest in safety. as a result, americans developed production methods that were both highly productive and often very dangerous.