Which of the following statements are true in the context of volcanic eruptions?

1.Volcanic eruptions emit lava, ashes and toxic gases

2.High temperature and pressure melt rock into magma, which rises toward the surface

3.The Pacific Ocean is the 'Ring of Fire' with the most active volcanoes

4.Major volcanic eruptions have been felt as changes in weather

A2, 3 and 4

B1, 2 and 3

C1, 2, 3 and 4 ✓ Correct

D1, 3 and 4

Correct answer: (C) 1, 2, 3 and 4

Explanation

All four statements about volcanic eruptions are correct.

Statement 1 is right: eruptions release lava, ash and toxic gases.

Statement 2 is right: high heat and pressure melt rock into magma that rises toward the surface.

Statement 3 is right: the Pacific rim is the Ring of Fire with the most active volcanoes.

Statement 4 is right: major eruptions have altered global weather by loading the air with ash and aerosols.

Erupted sulphur aerosols can reflect sunlight and cool the climate for months to years.

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