The subduction zones are the features that are created along the convergent plate boundary, where two plates move towards each other. As both the converging plate collides, the denser and heavier plate subducts below the less denser plate and this results in the formation of the subduction zone. As the heavy plate goes down, the pressure on the buried rocks increases and the denser rocks are pulled down deep into the greater depth, where the rocks undergoes partial melting. This zone is marked by the presence of a V-shaped trench that lies just above it.
An igneous rock such as basalt may break down and dissolve when exposed to the atmosphere, or melt as it is subducted under a continent. Due to the driving forces of the rock cycle, plate tectonics and the water cycle, rocks do not remain in equilibrium and are forced to change as they encounter new environments.
Of all the energy that does reach Earth, slightly less than 34 percent is reflected back to space by clouds. The Earth itself reflects another 66 percent back to space. Less than one percent of the total energy that reaches Earth is used by plants for photosynthesis.
The correct answer is d. morula. <span> A morula is a stage in early development, formed 3–4 days after fertilization. It is a 16-cell mass which forms a solid ball contained within the zona pellucida. A morula develops into a blastocyst.</span>
