Answer:
I moved to Khulna from Dhaka.
Explanation:
Internal migration is a type of movement where human movement happen within a country. Here Khulna and Dhaka are major cities of Bangladesh.
The study of the physical elements of the earth is the answer
Answer:
1. Mid-ocean ridges.
2. Submarine canyons.
3. Turbidity currents.
4. Continental volcanic arcs.
5. Volcanic island arcs.
6. Ring of fire
Explanation:
When two oceanic plates collide one oceanic plate is eventually subducted under the other. Where one plate slides under the other is referred to as the 'subduction zone'. As the subducting plate descends into the mantle where it is being gradually heated a benioff zone is formed. This benioff zone is a zone of shallow,intermediate and deep focused earthquakes. Some deep focused earthquakes that occur at ocean ocean- collision boundaries can be as deep as 670 kilometres. As the subducted plate descends into the mantle it is gradually heated allowing the formation of magma. The magma that forms is andesitic in composition and begins to form when the subducted plate reaches a depth of 100 kilometres. This andesitic magma is formed from the partial melting of the asthenosphere just above the subduction zone. This partial melting of the subducting plate is due to the loss of water as it descends into the mantle. The andesitic magma is now less dense than the surrounding material so it rises through the crust and erupts to form an arc of volcanoes called an island arc
