Analogy

The words in each pair are synonyms of each other.

Second helps to overcome the first.

First is a way of playing with / using the second.

Hierarchy is a ranked order of individuals. Similarly, chronology is a sequential order of events.

As all terms given in the question are medical terms and Hematology is also medical term.

Second denotes the class to which the first belongs.

Second one had one more side than the first.

As magnet has poles similarly battery has terminals.

24 → 2 x 4 = 8 32 → 3 x 2 = 6

The words in each pair are synonyms of each other.