plant requires seed dispersal for reproduction & if a living thing requires something then that something has a positive impact on that living thing ->  seed dispersal has a positive impact on a plant / a plant 's reproduction  bears eat berries / insects / animals & a berry contains seeds ->  bears eat berries that contain seeds  bears eat berries that contain seeds & an example of seed dispersal is animals eating / excreting seeds ->  an example of seed dispersal is bears eating berries that contain seeds  seed dispersal has a positive impact on a plant / a plant 's reproduction & an example of seed dispersal is bears eating berries that contain seeds ->  bears eating berries that contain seeds has a positive impact on plants by causing seed dispesal  bears eating berries that contain seeds has a positive impact on plants by causing seed dispesal & seed dispersal is when the seeds of a plant are moved / are carried / are spread / are dropped / from the parent plant to another area / new environment -> bears eating berries that contain seeds has a positive impact on plants by spreading those seeds