Concept:Endospermous seeds retain endosperm as a food storage tissue; maize grain is a common example.Explanation:Bean, cashew nut, and cotton seed store food mainly in cotyledons and lack prominent endosperm at maturity. They are non-endospermous. Maize grain has a large endosperm that nourishes the embryo, making it an endospermous seed.Answer:D. maize grain