seed
embryo
The endosperm. It is a food storing tissue located outside the embryo.
Seeds can be refereed to as plants in storage because you can store seeds somewhere for years until you are ready to plant them. After you plant them they obviously become plants.
Dahlia store food in their tubers.
Seeds store it in the endosperm.
the soil
Cabbage
Leaves
Starch is food that plants is stored
plant cells store food in the plant and animals look for food to eat
they store it in the plant cells to use later.
Source and sink