Answer:
A, B, C, and D are correct: all the options are correct because they are all beneficial products of vulcanic activity.
Explanation:
Over the ages, volcanic eruptions, processes and activities have greatly benefited the human race in one way or another:
1. The Hawaiian Islands were formed as a result of volcanic activities.
2. Volcanic activities have been known to break down and weather volcanic materials to produce fertile soil which has been used to cultivate abundant food.
3. Geothermal energy is another beneficial product of volcanic activities; it is created from the internal heat generated from young volcanic systems.
4. Sills are another product of volcanic activities. They are formed whenever molten magma from any volcanic activity cools down and solidifies.
In addition to the products of volcanic activities listed above, most of the Earth’s metallic minerals (such as gold, silver, zinc, copper, and land) can also be included as products of the magma that usually erupts whenever there are volcanic activities.
