Spreading of seeds on the ground is known as sowing. And spreading of seeds by wind is known dispersal.
It's the seed from a sunflower.
seeds
it is the seed pod/ fruit. the seeds are found in the centre of the fruit, the seeds do not mature and are normally observed small dark specks
It is called a cotyledon. I'm not to sure about the definition, but I bet you could look it up. Hope this helps!!!!