The word you want is dehiscence, where the pod twists and explodes, throwing the seeds out
There is no explaination. It is just a way that plants reproduce, eg. splitting open forcefully, by water, by wind, or by animals. That's all.
Himilayan balsam plant seeds are dispersed by wind, the plant shoots its seeds out into the air, some seeds are further spread or carried by water.
fruits like balsam burst with a sudden jerk and disperse the seeds by an explosive mechanism
disperse is to spread out seeds in an organized or randomized manner!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!