Explanation:

Pair 1 is correctly matched: Composite Volcanoes are characterised by the eruption of cooler and viscous lavas, often resulting in explosions. These explosive eruptions lead to the accumulation of large quantities of pyroclastic material and ashes near the vent openings. These continuous deposits of pyroclastic materials lead to the formation of layers, giving the volcanoes a mountain shape. Pair 2 is correctly matched: Mid-Oceanic Ridge Volcanoes are a part of the Mid-Oceanic Ridge System and are formed in oceanic areas. The central portion of this ridge experiences frequent eruptions as a result of Seafloor Spreading. As the plates separate, the molten rock rises to the seafloor, producing enormous volcanic eruptions of basalt. Pair 3 is correctly matched: Shield volcanoes are mostly made up of basalt, a type of lava that has a lower viscosity and it is because of this reason that these volcanoes are not steep. They become explosive if water somehow gets into the vent; otherwise, they are characterised by low explosivity. The upwelling lava moves in the form of a fountain, throws out the cone at the top of the vent, and develops into a Shield Cone. Ex- Hawaiian volcano is an example of a shield volcano. Pair 4 is correctly matched: Dormant Volcanoes are those that have not erupted in a very long time. Dormancy occurs because magma from the Earth's mantle can no longer reach the volcano due to the continuous shifting of the tectonic plates. Reference: NCERT, C