Concept:Perishable goods must be moved quickly to prevent spoilage, so the fastest transport mode is preferred.
Explanation:Perishable goods like fresh fruits, vegetables, flowers, and dairy products lose quality quickly.
Among the given options, air transport is the fastest and most reliable mode.
It reduces travel time and helps goods reach distant markets while still fresh.
Road and rail are slower, and pipelines are not suitable for such goods.
Hence, air transport is the best choice for conveying perishable goods, especially over long distances.
Answer:A. air