Answer:
The correct answer will be option-food stored within the seed
Explanation:
The plant embryo is the part of the seed which is formed after the fertilization and forms the earliest forms of life of plant including plant roots, leaves and stem.
The embryo is protected by a hard protective layer forming a structure called seed which also encloses reserve food for the plants.
If date palm seed germinates after a dormant phase for a long period of time, then the food material received by the growing embryo will be provided by the reserve material as well as the endosperm (angiosperm) which also acts as a reserve food material.
Thus, food stored within the seed is the correct answer.