At which plate boundary do frequent, large earthquakes, volcanic activity, and the formation of deep ocean and trenches occur? a. divergent. b. fault. c. convergent. d. formative

Option (C)

Explanation:

In a convergent type of plate boundary, the plates move towards each other. Due to the collision of plates, it results in the formation of a subduction zone where the denser plate subducts below the less dense plate. The subduction zone is marked by the presence of a narrow depression above it which is commonly known as the oceanic trench.

As the denser crust goes into the asthenosphere layer, the rocks undergo partial melting and mix with the magma, which then rises upward in the over-riding plate and leads to the formation of volcanoes.

The convergent plates are responsible for the occurrence of deep-focus earthquakes.

Thus, the correct answer is option (C).