What type of plate boundary is illustrated in figure 9-1

The type of plate boundary illustrated in the question is the Convergent plate boundary.

Plate boundary is the boundary edges where two plates meet and are either moving apart, together or colliding. At the plate boundaries, activities  such as building of mountain, earthquakes, volcanoes does occur.

There are 3 type of Plate boundary:

Usually, strong earthquakes, volcanic mountains, islands are formed at the Convergent boundary when the sinking oceanic plate melts. Therefore, the type of plate boundary in the image is the Convergent plate boundary.

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The answer is:

This type of plate is Convergent plate boundary.

The explanation:

from this figure we can see that two  plates meet together and one of this  plates go under the other  plate and this represent the convergent plate boundary.

when The convergent plate boundary is formed when two plates move towards each other and go uplift forming a mountain chains if their density equal to each other, and if it is not equal so one this plate go under the other one and this called subduction zone.