B is the answer.
A doesn’t make sense, animals don’t really help hunters.
D doesn’t make sense either, transportation was good but herds of animals usually weren’t only used for that.
E could make sense but usually they already had an abundance of fur and skins from animals they had killed in the past.
F animals rarely help when preparing land for planting and I doubt they knew how to use them for such things, though it’s possible, it’s very unlikely, especially since they just got them.
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C. 25, i got that by looking at how many lines are in between 0 and 50. which is 2. so u divid 50 by 2 and get 25
Known as a convergent boundary