Tropical : polar : hot : cold this is called antonyms part/whole or characteristic?

I would assume the question is asking which applies to the comparisons, which would be antonyms.

Explanation:

Antonym means opposite and polar: tropical and hot: cold would imply opposite.

Hope this helps!

pandas are endangered because of habitat destruction by humans.

as of 2014 there were around 2,000 left, since then, it supposedly has risen 17%.

they are a very endangered species.

-theoneandonly003