What are the four mechanisms for plant seed dispersal?

The four primary mechanisms for plant seed dispersal are wind, water, animals, and explosion. Wind dispersal involves seeds being carried away by air currents, while water dispersal allows seeds to float and travel via rivers or oceans. Animal dispersal occurs when animals eat fruits and excrete the seeds elsewhere, and explosion dispersal involves seeds being forcibly ejected from the parent plant, often through the build-up of internal pressure. Each mechanism helps ensure that seeds reach new locations for germination and growth.