Water is to moisten as spade is to dig.

synonym analogy
antonym analogy
description analogy
function analogy

Water is to moisten as spade is to dig is a function analogy

Explanation:

A function analogy follows the premise of what something is used for.then in the sentence "Water is to moisten as spade is to dig" we are talking about the use of the nouns as objects or tools, water can be used to moisten if it is poured over another thing, and a spade is used to dig the soil in any kind of land. The other options describe other parts of speech or use.

i would like to compare these two interpretations of the crucible : 1) eric christ's interretation and wade bradford's interpretation. the main differences between there interretaions is that in the first one you can notice direct link to joseph mccarthy whereas the second one represents how the town is filled with hysteria.the second interpretation shows that author believes that the story   about puritan town in salem is based on actual events while the first example shows the sencible reference to sort of bias.