Burdock is a common weed that grows along roadsides and in open fields. the flower of this plant produces a sticky burr that contains seeds. the burr will attach to anything that comes into contact with it. the burrs often attach to the fur of animals that touch it. these animals then carry the burrs to other areas, allowing the burdock to spread its seeds. which of these describes the relationship between the burdock plant and animals that have fur? commensalism mutualism parasitism predation