if a living thing requires something then that something has a positive impact on that living thing & plant requires seed dispersal for reproduction ->  seed dispersal has a positive impact on a plant / a plant 's reproduction  if seeds stick to the fur of an animal then that seed will be transported by the animal & seed dispersal is when the seeds of a plant are carried from the parent plant to another area / new environment ->  an example of seed dispersal is seeds sticking to the fur of an animal  seed dispersal has a positive impact on a plant / a plant 's reproduction & an example of seed dispersal is seeds sticking to the fur of an animal ->  seeds sticking to the fur of an animal has a positive impact on a plant by causing seed dispersal  seeds sticking to the fur of an animal has a positive impact on a plant by causing seed dispersal & seed dispersal is when the seeds of a plant are spread from the parent plant to another area / new environment -> seeds sticking to the fur of an animal has a positive impact on a plant by spreading that plant's seeds