Concept:Maize is a cereal crop, so it can only be replaced in the table by another cereal crop.Explanation:Maize belongs to the group of cereal or grain crops.Cassava is a root or tuber crop, so it is not a suitable replacement.Cashew and mango are tree crops, so they cannot replace maize in the table.Millet is also a cereal or grain crop, just like maize.Therefore, millet can conveniently replace maize in the table.Answer:D. millet
