an association between 2 organisms which one benefits and the other doesn't now benefit or harm
benefits both organisms
benefits the parasite
how humans impacting the environment
humans have a negative way in our environment. we pollute the oceans and the lands, including the chemicals and our fertilizer. when we have rain, it washes into the waters and makes the fishes die.
I choose the zooplankton, the penguin, and the killer whale. the zooplankton is the producer. the penguin is a consumer, and the killer whale is the tertiary consumer. killer whale eats penguin, and the penguin eat the zooplankton.