It would be the second one. about the animals and people.
S-V-O is the answer to your question
Yes, because (12) is referring to a page number.
I mean, if you're writing an essay, this would be correct. But if you're just stating your opinion, that's wouldn't need to be cited.
Answer:
In many areas of the Andes, farmers, communities, and the Inca state constructed agricultural terraces (andenes) to increase the amount of arable land. Andenes also reduced the threat of freezes, increased exposure to sunlight, controlled erosion, and improved the absorption of water and aeration of the soil.
Explanation:
