A
Promotion of commercial farming in arid and semi-arid areas
B
Development of gardens using genetically modified flora
C
Creation of mini forests in urban areas
D
Harvesting wind energy on coastal areas and on sea surfaces.
Correct answer: (c) Creation of mini forests in urban areas
Explanation
- A
Promotion of commercial farming in arid and semi-arid areas
Commercial farming in drylands. Not Miyawaki.
- B
Development of gardens using genetically modified flora
GM gardens. Not Miyawaki.
- C
Creation of mini forests in urban areas
Mini forests in urban areas. Dense, fast, native planting on small plots.
- D
Harvesting wind energy on coastal areas and on sea surfaces.
Wind harvest. Unrelated.
Summary. Official key is (c). The Miyawaki method packs native seedlings densely to grow a multi-layer mini-forest quickly — used on urban scraps of land.