2) you can touch something that is palpable, so c) – you can see something that is visual. Note that this is the only answer that involves one of the five senses – all the other ones do not.

3) these are synonyms, as are a) say:declaim. The others are antonyms.

4) these are antonyms, as are c) disparity: similarity

5) these are synonyms, as are b) heroic: brave. Also, these involve behavior, which is why I didn’t pick d, which are also synonyms.

You will do a lot better with analogies if you look up the words involved.