Concept:A major barrier to agricultural growth in Nigeria is the poor preservation and storage of harvested crops.
Explanation:Many farmers in Nigeria lack access to modern storage facilities such as silos, cold rooms, and warehouses.
This leads to high post-harvest losses as crops like tomatoes, maize, and yams perish before reaching the market.
Such losses reduce farmers' income and discourage increased food production.
The other options, like using fertilizer instead of manure or the presence of equatorial forest, are not the main agricultural development problem in Nigeria.
Answer:The correct answer is C. insufficient storage facilities.