Abandoned railroad tracks are overgrown with weeds. ten years later there are small aspen trees growing in the middle of the tracks. this change is an example of

answer; i believe that the correct answer is ( rivers);

balearic sea - is a body of water in the mediterranean sea around the balearic islands. baltic sea - is a mediterranean sea of the atlantic which is enclosed by scandinavian and baltic countries. barents sea - is a marginal sea in the artic ocean located off the northern coast of norway and russia.