Grass clippings and other plant material can be returned to the environment for recycling if collected in a

Grass clippings and other plant material can be returned to the environment for recycling if collected in a- compost pile

Compost is rich in nutrients. Its a decomposed organic matter through a  process called composting where various organic materials are recycled and it produces a soil conditioner.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).