Competition, predation, cooperation, symbiosis between same and different kinds of organisms, competes for avalible resources (food, light) between different kinds of organisms, hunst and kills eachother in order to supply their energy (shelter) between same organisms, lives together and helps eachother out (mates) between different kinds or organisms, lives in close association wiht another kin of organism (space/territory) all non-living things in an ecosystem are interconnected and changing even one thing impacts the whole ecosystem
