The root.
Swede
No, swede is a taproot plant. Taproots are thick roots that grow deep into the soil, while fibrous roots are thin roots that spread out close to the surface.
An ovary is the part of the plant an apple comes from.
To get seeds from a swede (rutabaga), allow the plant to flower and produce seed pods. Harvest the seed pods when they turn brown and dry on the plant. Open the pods to collect the seeds for planting in the next season.
Banana is the fruit of a plant
A beet is a root plant.
Parsnips come from the root of the parsnip plant. They are a biennial plant, and the edible part is the thick, white taproot that grows beneath the ground.
It is a plant in it's own right, not part of anything else.
kiwi comes from the bud of the plant
Caraway is the seed of the caraway plant.
stem
Root.