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  seed dispersal has a positive impact on a plant / a plant 's reproduction & an example of seed dispersal is is an animal hiding / gathering / burying seeds ->  an animal hiding / gathering seeds has a positive impact on a plant by causing seed dispersal  an animal hiding / gathering seeds has a positive impact on a plant by causing seed dispersal & 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 ->  an animal hiding / gathering seeds has a positive impact on a plant by spreading those seeds to a new environment  an oak is a kind of tree & a tree is a kind of plant ->  an oak tree is a kind of plant  an animal hiding / gathering seeds has a positive impact on a plant by spreading those seeds to a new environment & an oak tree is a kind of plant ->  an animal hiding / gathering seeds has a positive impact on an oak tree by spreading those seeds to a new environment  an animal hiding / gathering seeds has a positive impact on an oak tree by spreading those seeds to a new environment & an acorn is a kind of seed ->  an animal hiding / gathering acorns has a positive impact on an oak tree by spreading those acorns to a new environment  a bird is a kind of animal & a blue jay is a kind of bird ->  a blue jay is a kind of animal  an animal hiding / gathering acorns has a positive impact on an oak tree by spreading those acorns to a new environment & a blue jay is a kind of animal -> an blue jay hiding / gathering acorns has a positive impact on an oak tree by spreading those acorns to a new environment