The part of the seed that provides food for the embryo is called the endosperm.

Here's a breakdown:

* Seed: The basic unit of plant reproduction, containing a tiny embryo.

* Embryo: The miniature plant within the seed, with the potential to grow into a full plant.

* Endosperm: A tissue rich in nutrients, typically starches, proteins, and fats. It acts as a food source for the embryo during germination.

Note: Not all seeds have a distinct endosperm. In some seeds, like beans, the cotyledons (seed leaves) are the primary food storage structures.