Answer and Explanation:
In case, the major ocean currents stops or slows down, the heat distribution on the Earth will be affected in the following ways:
- There would be quite significant climatic changes.
- It affects one of the major phenomena in the ocean , the thermohaline circulation of the ocean which is responsible for the supply of heat to the polar areas.
- Heat distribution is affected in such a way that keeps the warm water of the equatorial region remains in the same region and can not delivered to the polar areas.
- This phenomena results in more heat in the equatorial region and colder polar areas.
An increase in human population leads to environmental issues such as pollution. This is because when there is an increase in population there would be an increase food resources therefore would have more pollution as well as higher gas emissions.
The correct answer is B Subduction. Subduction is the process by which an oceanic plate gets dragged under another plate and is eventually destroyed in the mantle. Subduction occurs at convergent margins where two oceanic plates collide or an oceanic and Continental plate collide. Oceanic crust is made of mainly of silica and magnesium which is heavier or denser than continental crust which is composed mainly of silica and aluminium.
The subducting plate melts producing excess magma giving rise to volcanoes along these margins.
