Association tracts are one of the three types of tracts present in the white matter of the cerebrum. These tracts have myelinated axons. Association tracts are the tracts of myelinated axons that serve to deliver the nerve impulses between the gyri of the same cerebral hemisphere. Association tracts are connected with the associated areas of the cerebrum. Association areas of the cerebrum are interconnected by associated tracts.
Because when factory and other industries dumped their wastes into water they begin to react on environment and fishes will die and that water or river smell so bad
