Do you think the strength of the earth's polarities have a direct correlation to emotion?

No. There is no known mechanism for the earth's magnetic field to control the strength of human emotion, and in fact most devices we're around in day-to-day life expose us to magnetic fields stronger (actually much MUCH stronger) than that of the earth's, which is actually quite weak in comparison.

I don't know how it would, but there is a lot we do not understand.

There are people who use magnets in healing, so the effect of polarity on mental state may also be a possibility, but how that would work, I do not know.

Human emotions are stronger when there are great events, either positive or negative.

It is interesting that this article discusses the possibility of a pole flip. I hadn't seen any scientific reference to that possibility before.

One of theories about Atlantis is that it was Antartica, and the poles flipped.

I can still see Russia from my house.

My emotions weren't nearly as strong 1000 years ago, 'cos I weren't born yet.

I don't like poles, by the way.

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Would that include the emotions of birds, dogs, cats, lions, tigers, elephants, etc etc etc?

I'm unaware that MRI machines have any serious effect of human emotions, so I doubt it.