The magma trapped beneath the subduction zone accumulates and finds its way through the crust.
Explanation:
The volcanoes in A are product of the magma coming from the mantle into the ocean and cooling down, producing new seebed. The volcanoes in A are fissure volcanoes and remain active as long as the tectonic plate has margins under the ocean. The volcanoes in B are product of the oceanic crust melting beneath the continental crust.
The continental crust is floating over the oceanic crust (oceanic floor), so when there is a collision between oceanic floor and continent, the ocean floor goes beneath it. As the oceanic crust goes into the mantle, it melts and accumulates under the continental crust. This new material then starts to ascend by means of pressure and increase of temperature and escapes through the continental crust in the form of a volcano. The magmatic chamber erupts only when enough incandescent magma accumulates inside it.
A gene is a section of a DNA molecule that contains the information to code for one specific protein. The gene contains the code that determines the structure of a protein.
Both of the Hibiscus plants have different colors, when mixing both the blue and yellow gene the younger plants combined the genes and make the color green.
