IQ Test Labs

'Blue marlin: Blue tang :: Blue crab : Blue damselfly' works as intended because it follows the logic of pairing animals based on their names starting with "blue."

'Marlin:Tang::Crab:Zest', is based on a shift from animals to tastes and can indeed be considered a legitimate interpretation within a broader framework. The most rational or straightforward interpretation however, remains within the realm of naming animals with the prefix "blue." This 'animals' interpretation requires the least amount of assumption, maintains consistency with the given context (animal names), and aligns with what would likely be common knowledge among the intended audience.

In educational settings, the expected approach to analogies typically involves finding the most straightforward connection. Creative interpretations, although intellectually valuable, may not align as well with conventional expectations, making them weaker choices for correct answers.

Follow-up: After reviewing the statistics, it has been observed that "Zest" is the most frequently chosen answer. Given that the intention behind these questions is not to cause confusion, the option "Zest" may be dropped in future revisions of the questions. Thank you for pointing out the overlooked aspect of 'taste', however, the correct answer remains 'Blue damselfly.'

This is more of a general knowledge question than a logic question. It is general knowledge, in that one has to know the creatures whose names begin with 'blue.' The logic/analogy element is that 'blue' is the common theme among all four items.