Final answer:
Hawaii is the place that is the result of volcanic activity over a mantle hot spot. This hot spot has created a chain of volcanic islands as Earth's plates moved over it. In contrast, Mount Everest, the Grand Canyon, and the Great Barrier Reef were not formed by hot spot volcanism.
Step-by-step explanation:
The place that is the result of volcanoes erupting over a hot spot in the mantle is Hawaii. Mantle hot spots are areas where heat rises from Earth's interior, far from plate boundaries, fueling volcanic activity. Hawaii, particularly, is situated over a well-known hot spot which has been active for at least 100 million years. This hot spot has produced a chain of volcanic islands through the volcanic eruptions as Earth's plates have moved over it. While Mount Everest, the Grand Canyon, and the Great Barrier Reef are all spectacular natural features, they were not formed by hot spot related volcanic activity.
The Hawaiian volcanic mountains are some of the largest mountains on Earth, with Mauna Kea being a prominent one that, though now dormant, serves as a prime site for astronomy due to its substantial height when measured from its base on the ocean floor. The activity over the hotspot has resulted in the creation of the Hawaiian island chain, which marks the movement of the Earth's plates over a stationary hotspot.