Final answer:
A seed's store of food reserves is used during germination and its development into a seedling.
Step-by-step explanation:
A seed's store of food reserves is used during germination and its development into a seedling. The embryo of a seed relies on the stored food, also known as endosperm, until it can start making its own food through photosynthesis. The stored food in a seed can be found in the cotyledons, which are the seed leaves of the embryonic plant.