Final answer:
To identify major plate boundaries, analyze earthquake and volcano location maps and hypothesize the locations and type of motion. Count the number of each type of boundary on the map to determine the most abundant type.
Step-by-step explanation:
a. To identify the major plate boundaries, we need to analyze the earthquake and volcano location maps (Figures 1.4-1.5). Based on these patterns, we can hypothesize the locations and type of motion for each boundary. We will use three different colors on the blank map in Figure 1.6 to represent each boundary type: red for divergent boundaries, blue for convergent boundaries, and green for transform boundaries.
b. To determine which type of boundary is the most abundant, we need to compare the number of each type of boundary on the map. Count the number of red lines (representing divergent boundaries), blue lines (representing convergent boundaries), and green lines (representing transform boundaries). The type of boundary with the highest count will be the most abundant.