Answer:
A). A hand grenade.
Step-by-step explanation:
The authors are quite often witnessed employing analogies in the distinct forms like simile, metaphor, etc, with the chief aim to elaborate and clarify the meaning(connotative or denotative) of a specific word or idea.
In 'How to Eat an Ice-Cream Cone', the author compares a melting ice-cream to 'a hand grenade' to suggest the blast or explosion of flavors coming out of the cone held in hand is quite identical to the 'explosion' led by a grenade. The mechanism of grenade brings explosion which is similar to the blast/explosion brought in mouth by the crafting of ice-cream. Therefore, the author explains and clarifies his idea through this comparison. Hence, option D is the correct answer.