The author uses the word "immediacy" (line 39) most likely in order to express

Caleb on May 16, 2019

Example 3

It seems like people could still migrate, while still having a steady population. For example a bunch of people move as a result of climate, but that same change in climate influenced an equal number of people from other places to migrate to that same place.

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Ravi on May 16, 2019

@crmoser2,

Great question. I think you may be misreading what (C) is saying.

(C) says, "A population remains settled only where the climate is
fairly stable."

(C) is basically the contrapositive of one of the conditions that we
were given in the stimulus: "drastic shifts in climate always result
in migrations." The contrapositive of this is if there's no migration
(population remains settled), then there was no drastic shift in
climate (climate is fairly stable). This is why (C) is the most
strongly supported answer choice, as it's essentially restating one of
the conditions we were given in the stimulus.

Does this make sense? Let us know if you have any more questions!