The fruits and pods are the ‘packaging’ which protect the seeds.
The embryo is fragile, and must wait for the right moment to breach its protection and begin its development.
It is surrounded by several skins, shells, husk, drupe…
Some of these fruits must dry out and open in order to release the seed, others have made themselves delicious in order to be carried far away riding in an animal’s stomach.
Each plant has a way for disseminating its seeds (diaspora), strategy which can be understood by observing the shape of its seeds or fruits.