Final answer:
Both "A Sound of Thunder" and "Nethergrave" represent elements of the science fiction genre.
Step-by-step explanation:
Both Ray Bradbury's "A Sound of Thunder" and Gloria Skurzynski's "Nethergrave" represent elements of the science fiction genre. A Sound of Thunder explores the concept of time travel and its consequences, while Nethergrave delves into the virtual reality and the dangers of escaping into a digital world. Both stories incorporate futuristic technologies and speculative elements, which are key characteristics of the science fiction genre.