By the addition of spanish territories
Answer:
European colonizers killed so many indigenous Americans that the planet cooled down, a group of researchers concluded. Following Christopher Columbus' arrival in North America in 1492, violence and disease killed 90% of the indigenous population — nearly 55 million people — according to a study published this year.
Explanation:
The correct answer for 1 is C. Ohio
Ohio never had slavery because it was created according to the Northwest Ordinance as a state that is slave free. The other three had slaves and Texas even had them during the war since they didn't participate in it and they found a loophole in the Emancipation proclamation to keep having slaves.
The correct answer for 2 is a. Kentucky
Kentucky never seceded and joined the Confederacy but they wanted to and were even given confederate congress seats. However, the war ended and they remained a part of the Union just like they were before and during the war.
The correct answer for 3 is
<span>b.slave states in the Union
These were states like Kentucky which were found at the border with the confederacy. They had slaves but had not seceded and did not join the Confederacy. When West Virginia broke from Virginia it became a border state too.</span>
The primary difference between these two wars was that in the French and Indian War the colonists (who weren't that concerned with territory) were fighting alongside the British, while during the Revolution they were fighting against the British.