What is dispersal of seeds
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Explanation is in the file

tinyurl.com/wpazsebu

Seed dispersal is the development, spread or transport of seeds from the parent plant. Plants have restricted versatility and depend upon an assortment of dispersal vectors to move their propagules, including both abiotic vectors like the breeze and living (biotic) vectors like birds.

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint