The bowl-shaped depression at the top of a volcano is a A. <span>a. crater.</span>
Answer:
Option (A)
Explanation:
Trenches are usually defined as deep and narrow depressions that are formed along the convergent plate boundaries. These are the region where two tectonic plates move towards each other and result in the formation of a subduction zone, where the denser plate subducts below the less dense one. As the heavier plate goes down, it reaches the mantle and the rocks undergo partial melting.
These trenches are located just above this zone of subduction. It can also be said that the presence of a trench indicates a subduction zone.
One of the famous trenches is the Mariana trench which is present in the Pacific ocean and it has a depth of approximately 11 km from the mean sea level.
Thus, the correct answer is option (A).
Most of Africas native rain forest has been destroyed by development, agriculture, and forestry. Today, 80 percent of Africas rain forest is concentrated in central Africa, along the Congo River basin.
Mainly found in the tundra regions of Eastern and Central Europe, permafrost, a layer of perennially frozen subsoil, lies beneath the surface. Recently, permafrost, which is supposed to be continuously frozen, has been thawing in some places. The photo below is a picture of what is referred to as a "drunken forest." Because the trees roots are shallow, when the permafrost melts, the trees start to tip over. The melting of this permafrost throughout the Northern Hemisphere has been altering ecosystems and damaging roads and buildings across Russia and other countries of Eastern Europe.
i want to say between water power or natural gases
