imagine dat all the seeds produced by a plant happen to fall under the same plant & sprout into new plants . mention any 2 problems dat wil b faced by the new plants??
If all seeds of a plant fall on same place:
In favorable environmental conditions, they germinate there and become overcrowded. They compete for sunlight and water and fight for their survival and many plants would die. If any disease affects any plant there, it would immediately spread to all and end up with the death of all plants.
In an unfavorable environmental condition, they may not germinate.
To avoid this, seed dispersal is very important. Because, in nature same kind of plants grow at different places. This seed dispersal results in the highest survival rates for seeds, away from disease and predators.