Question

How are seeds dispersal by wind animals and explosion ?

Answer 1

Hey mate !!!

seed dispersion through wind...

Some times tiny seeds fly in air and settle down at a place and germinate ..

By animals..
Birds will leave the waste then in of the seeds germinate.

Explosion
some times groups of seeds in a pack will scatter/explode .

Answer 2

The seeds of some plants are dispersed by animals.

Plants such as burdock have hooks to which the seed is attached. These hooks easily get caught in the fur of mammals as they pass by the plant. At some point the seed will fall, often a considerable distance from the parent. If conditions are right the seed will germinate and grow into a new plant.
Some plants distribute their seeds by violently ejecting them so that they fall well away from the parent plant. This is explosive dispersal. An example of this is plants which belong to the Pea Family (Leguminosae). They produce seed pods which dry in the sun.
 
Seeds dispersed by the wind must be light and small in order to be carried by the wind. Plants have developed a number of different adaptations either to help the seeds be released (very small light seeds) or to help the seeds stay in the air for longer. This means they can be carried greater distances. Such adaptations usually involve hairs or outgrowths which increase the surface area to catch the wind.