Answer:
Gothic literature and the "Gothic" genre from the 18th century in general is also known as "Gothic horror" or "Gothic Fiction", mostly distinguished by the mystery in it, also the depiction of death, fear related stories, gloomy scenarios plus a combination of melancholy and romance as well.
Thus characters such as "The Monster" in "Frankenstein" which are beyond scientific understanding appeal to the supernatural, which also shares elements of horror and romance with "The Last Man".
Thereby the answer is definitely: "supernatural elements and mysterious settings"
Step-by-step explanation: