The correct answer is (b), Pacific Ocean.
The Pacific Ring of Fire is a horseshoe-shaped region around the Pacific Ocean where many earthquakes and volcanic eruptions occur. It is associated with subduction zones, where tectonic plates are moving towards each other and one plate is being forced under the other. This process causes the mantle material to melt, which rises to the surface and erupts as volcanoes.
The Atlantic Ocean is a relatively young ocean, and it does not have as many subduction zones as the Pacific Ocean. The Indian Ocean is also a relatively young ocean, and it does not have as many subduction zones as the Pacific Ocean.
None of the above is not the correct answer, because the Pacific Ocean is the only ocean that is associated with the Pacific Ring of Fire.