Answer:
b) a subduction boundary
Explanation:
The subduction boundaries, or convergent plate boundaries, are the places where the tectonic plates are colliding, and one of them subducts below the other. As one of the plates moves below the other, there's lot of pressure, and cracking occurring in the crust, so the magma manages to penetrate through it and comes out on the surface with ease. As it manages to get on the surface, it lifts up the land, and creates a cone shaped volcano. This volcanoes manage to make a very nice shape, the stereotypical volcano shape, and that is a result of constant pilling of material on the slopes of it. Some of the volcanoes that are regarded as the most beautiful are actually volcanoes of this type, like Mount Fuji in Japan for example.
The astenosphere plays a key role in the plate tectonics theory because it is the one that provides the high temperatures, high pressure, and magma, that are the ones responsible for cracking up the crust on the surface.
The astenosphere, with the ability to crack the crust on the surface of the planet is creating the continental and oceanic tectonic plates, and it also provides the push force from bellow so that they can move across the globe and thus be creating the landscape on the planet.
Explanation:
Urban Population Density, Climate Change, and Disasters The dense concentration of urban populations can increase susceptibility to the disasters that are likely to become more frequent and more intense as a result of climate change. Many aspects of urban areas are vulnerable to disasters and climate change.
