Unalienable means that it<span> cannot be taken away or denied.</span>
Mostly because they were afraid that Mexico would defeat them & they wanted the United States's protection.
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Hi.
Your answer is going to be
A.) agriculture
Agriculture has been greatly effected since the beginning of the 20th century. Partly due to WW1 and WW2 thus increasing the product demand and cause price spikes.
Hope this helps! :)
Europeans carried a hidden enemy to the Indians: new diseases. Native peoples of America had no immunity to the diseases that European explorers and colonists brought with them. Diseases such as smallpox, influenza, measles, and even chicken pox proved deadly to American Indians.
