Step 1: Understanding geodynamic features.
To solve this, we need to understand the geodynamic features associated with each region. These features relate to the movement of tectonic plates and volcanic activity.
Step 2: Analyzing Iceland.
Iceland is located on the Mid-Atlantic Ridge, where the tectonic plates are diverging. This region is also associated with plume-ridge interaction. Hence, Iceland corresponds to option (ii).
Step 3: Analyzing Afar.
The Afar region is known for the Afar Triple Junction, where three tectonic plates meet. Therefore, Afar corresponds to option (i).
Step 4: Analyzing Hawaii.
Hawaii is a hotspot island chain formed by a volcanic plume. The volcanic activity here is a result of the movement of the Pacific Plate over the stationary mantle plume. Hence, Hawaii corresponds to option (iv).
Step 5: Analyzing the Aleutian Islands.
The Aleutian Islands are located at a convergent plate boundary, where the Pacific Plate is subducting beneath the North American Plate. This zone is a classic subduction zone. Hence, Aleutian Islands correspond to option (iii).
Step 6: Conclusion.
Matching the regions to their respective geodynamic features gives us the correct answer as (B): P-ii; Q-i; R-iv; S-iii.
\[
\boxed{\text{P-ii; Q-i; R-iv; S-iii}}
\]
