To solve the given analogy question, we first need to understand the relationship between the words "Tepid" and "Hot". These two words describe levels of temperature where "Tepid" is relatively cool, and "Hot" is a higher intensity. The relationship is one of degree, or intensity.
Now let's examine the options to find a similar relationship:
The correct answer is Joy : Ecstasy, as it captures the same relationship of progression in intensity, from a normal level ("Joy") to an extreme level ("Ecstasy"), just as "Tepid" escalates to "Hot".
This is a degree-of-intensity analogy. Tepid means mildly warm, while hot means very warm, so the first word is a weaker version of the second and the pair moves from mild to intense.
So the correct match is option D, Joy : Ecstasy.