Final answer:
To show the process of subduction, one should plot earthquake data on a graph to represent the subduction zone cross-section and compare the subduction angles. Topographic profiles must include plate boundaries, key features like trenches, and the direction of plate movements.
Step-by-step explanation:
To illustrate the process of subduction, certain features must be represented. The graph paper should be used to plot the distance of earthquake foci from the trench on the horizontal axis, and the depth of the earthquakes on the vertical axis, where 1 cm represents 10 km. These points should be connected to approximate the cross-section of the subduction zone. Looking at the created graph, one could determine which region, the Chile-Peru border or central Chile, has a steeper subduction angle based on the slope of the plotted points.
On topographic profiles, you should identify types of plate boundaries, draw the boundary between the two plates as a line, and label key features such as oceanic or continental crust, mid-ocean ridges, volcanoes, mountain belts, and trenches. Direction of tectonic plate movement should be indicated with arrows. When plotting the data for a subduction zone, it is also critical to include the ocean trench and show how the oceanic plate is thrust down into the upper mantle, melting due to high pressure and temperature, thus participating in the cycle of plate tectonics.