Paddy (rice) is a staple crop that requires high temperatures, high humidity, and abundant rainfall or irrigation. South-East Asia, along with East and South Asia, constitutes the "rice bowl" of the world, producing more than 90% of the global rice supply due to its favorable monsoon climate and traditional farming practices.
Step 1: Analyze the options.
(A) South-East Asia: This region (including countries like Vietnam, Thailand, Indonesia, and Myanmar) is a global leader in paddy production due to the tropical monsoon climate.
(B) South-West Asia: This region is largely arid or semi-arid (Middle East), making it unsuitable for large-scale paddy cultivation which requires standing water.
(C) North-East Asia: While countries like China and Japan produce significant rice, the vast majority of global production is concentrated further south in the tropical and subtropical belts.
(D) North-West Asia: This area typically consists of colder or drier climates not conducive to the high-water requirements of paddy.
Step 2: Conclusion.
South-East Asia is the primary geographical region for the majority of the world's paddy production. Hence, the correct answer is (A).
Final Answer:
\[
\boxed{(A) \, \text{South-East Asia}}
\]