Answer: A positive feedback loop occurs in nature when the product of a reaction leads to an increase in that reaction. If we look at a system in homeostasis, a positive feedback loop moves a system further away from the target of equilibrium.
From small beginnings, South America grew to greatness because of maize. Just did this and it's correct.
I think the correct answer from the choices listed above is option C. It is the Amazon river that can swell to over 30 miles wide during its annual flooding season. <span>The </span>Amazon River<span> in South America is the largest river by discharge of water in the world and the longest.</span>
- Map scale refers to the ratio between distance on a map and the corresponding distance on the ground.
- So, the option that goes with it is c. Measure the distance between places.
Hope you could get an idea from here.
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