Concept: Tropical storms are known by different names in different parts of the world. The name depends on the ocean basin or region where the storm occurs.
Step 1: Match hurricanes.
Hurricanes are commonly used for tropical storms in the North Atlantic region.
\[
A \rightarrow III
\]
Step 2: Match typhoons.
Typhoons are tropical storms occurring mainly in the Pacific region.
\[
B \rightarrow II
\]
Step 3: Match tropical cyclones.
In South East Asia and the Indian Ocean region, the term tropical cyclone is commonly used.
\[
C \rightarrow I
\]
Step 4: Match willy-willies.
Willy-willies are associated with Australia.
\[
D \rightarrow IV
\]
Therefore, the correct matching is:
\[
A-III,\ B-II,\ C-I,\ D-IV
\]