Completing Analogous Pair

Completing Analogous Pair - Analogous means similar or corresponding in some respect. Similar in function but having different evolutionary origins, as the wings of a butterfly and the wings of a bird. In each of the questions, there is a certain relationship between two given words on one side of :: and one word is given on another side of :: while another word is to be found from the given alternatives, having the same relation with this word as the words of the given pair bear. Put yourself to the test and learn some fun facts along the way.