Concept:Market gardening is located near large cities because its products are highly perishable and must reach consumers quickly.
Explanation:Market gardening mainly produces fresh vegetables, fruits, and other perishable items.
These items cannot be stored for long without refrigeration or processing.
If farms are located far from cities, the products may spoil before reaching the market.
Thus, locating these farms close to large urban centres reduces the time between harvesting and selling.
Perishability of products is therefore the most important factor among the given options.
Other factors like fertile soil and transportation are also useful, but they do not best explain the closeness to cities.
Answer:C. Perishability of products