The correct answer is - B. Rhyolitic.
The rhyolitic magma has a trademark signature to be the magma type that causes the most catastrophic, powerful, explosive volcanic eruptions. This is due to the composition of the magma. This type of magma is very high in silica content, which in turn makes it very viscous, and because it is very viscous, the high amount of gasses that it contains remain trapped in it, the pressure is building up inside of it, so when it reaches the surface it is highly explosive.
The correct answer is D. Steel
Urbanization became famous during industry revolution. There were factories being built and also there were more agricultural workers attracted to the work available then in the cities and also there were new immigrants that increases the population of the cities.
Contagious diffusion is wide-spread and involves interpersonal contact.
The line would have to pass through at least two points.
