They outline the crater caused by the impact of an asteroid. They follow the shape of the adjacent tectonic plates under the sea. One volcano usually triggers a second volcano with its hot magma. Volcanoes always form in rings because of underwater convection currents.
The "Ring of Fire" is a long chain of volcanoes that encircles the Pacific Ocean. Which of the following is the best explanation for the arrangement of these volcanoes?

Options:
- They outline the crater caused by the impact of an asteroid.
- They follow the shape of the adjacent tectonic plates under the sea.
- One volcano usually triggers a second volcano with its hot magma.
- Volcanoes always form in rings because of underwater convection currents.

They follow the shape of the adjacent tectonic plates under the sea.