(a). in an ecosystem, organisms are dependent on each other for their survival. small fish eat plankton. in the fish, chemical energy from plankton is converted used by fishes to swim. these fish are then devoured by large fish.(b). bacteria break down the dead bodies of fish to release energy, which is then absorbed by other organisms in the ecosystem. this flow of energy is an example hu of (a).(1 ) oxygenated energy (2) radiant energy (3) mechanical energy (b).(1 ) loss of energy (2) creation of energy (3) conservation of energy