Coastal regions, particularly those in lower latitudes, often exhibit a Tropical climate characterized by high humidity and moderate-to-high temperatures. The proximity to the ocean creates a maritime effect, which stabilizes temperatures compared to inland areas.
Step 1: Analyze the options.
(A) Temperate: Found in mid-latitude regions with distinct seasonal changes.
(B) Tropical: Characterized by consistent warmth and moisture, typical of many coastal belts.
(C) Subtropical: Zones bordering the tropics with more seasonal variation.
(D) Polar: Extreme cold regions near the Earth's poles.
Step 2: Conclusion.
Tropical is the most appropriate general classification for these regions. Hence, the correct answer is (B).
Final Answer:
\[
\boxed{(B) \, \text{Tropical}}
\]