18. The following are effects of volcanic eruption
Which of them is/are harmful?
1. Hotsprings in volcanic areas are useful
medical and creational purposes.
II. Volcanic ashes make the soil fertile.
III. Volcanic gases can be used to provi
geothermal steam.
IV. Volcanic lava causes destruction of
lives and property.
A. I and II B. II and III C.IV D. II​