Question

no doubt many sci-fi storytellers over the generations have puzzled over how to bring back the beloved monsters of prehistoric times. the idea of finding dino dna locked in yellow amber pebbles seems like a pretty neat concept. the only problem is that its likely just a far - flung fantasy; it will probably never escape the big screen into the real world.
however, amber is a real thing, and its science is quite remarkable in itself. amber is not actually a stone it is actually resin, (7) a thick, sticky liquid produced by many trees to protect them from dangerous insects. the resin dries up and, over thousands or millions of years, turned (8) into a rock - hard fossilized form. (think of the maple syrup that dries around the rim of the bottle cap, but a hundred times harder and millions of times older.)
choose the option that best answers the question.
which choice most effectively maintains the essays tone?
no change
an intriguing
a sort of good
a kind of nice

Explanation:

The original word "pretty neat" is informal and colloquial. "An intriguing" is a more formal and appropriate adjective to describe the concept in an academic or essay - like tone. "A kind of nice" and "a sort of good" are also too informal and do not fit well in the context. "NO CHANGE" would keep the informal tone.

Answer:

an intriguing