Answer:
Density is one of the most factors that play a key role in plate tectonic activities. Some of the ways in which density is important in the field of plate tectonics are as follows-
- The convergent plate boundaries are responsible for the creation of a subduction zone, where the high-density lithospheric plate subducts below the less dense one. It is because the heavier plate is comprised of heavy minerals thereby forming heavier rocks as a result of which its density increases. Due to these differences in density, there occurs a subduction zone.
- The divergent plate boundary forms where two plates move away from one another. This type of plate motion is responsible for the eruption of magma on the seafloor. As the plates diverge, the lithosphere becomes eventually thin, and with more progressive spreading, the magma comes out to the seafloor. This is because the hot magma is less dense, and forms convection cells as they rise upward. This is how the density helps in the upwelling of magma at the mid-oceanic ridge in a divergent plate boundary.
- When there collide two plates of equal densities, then it gives rise to the formation of huge mountains, because neither of them is heavy to get sink. So it uplifts the crust, forming a sandwich-type pattern.
Correct answer choice is :
<h2>B) A metamorphic rock.</h2><h2 /><h3>Explanation:</h3><h3 />
A metamorphic rock is a consequence of a conversion of a pre-existing rock. The primary rock is reduced to very high heat and pressure, which produce distinct physical and chemical changes. Samples of these rock types comprise marble, slate, gneiss, schist.
The answer is letter B. Particles in the atmosphere clearing the surrounding air which did not occur as a result of oil production and distribution around the Persian Gulf. All other choices such as A, C, D happened or occurred as a result of the oil production around the Persian Gulf.
The Atlantic Ocean on the west and Indian Ocean on the east border the region of Saharan and southern Africa. The correct option among all the options that are given in the question is the second option or option "b". I hope that this answer has come to your help.
