Which of these is a negative consequence of the Columbia exchange 1. Diseases killed millions of Native American

2.millions of Africans were enslaved and moved to the Americans

3.new species of plants and animals threatened native Americans

4.all the above

I beleive it's 4, all of the above. I know it's 1 and 2 for sure!

the correct answer option is: weapons.

explanation:

tensions rose as the two opposing superpowers competed for 'weapons'.

referring to the cold war (1945-1991), the two superpowers, usa and ussr, experienced a phase of struggle and conflict with each other. these two superpowers considered each other as a threat to their survival and thus opted for policies to strengthen their positions.

the two superpowers never went to war with each other directly but competed for weapons to preserve their positions.

we need the map to answer the question