How do gastropods function as decomposers?

In which of the following relationships is one organism always benefited while the other organism is always harmed

How did alexander fleming’s research solve a societal problem? he developed ways to treat inherited diseases. he advocated for regular hand washing to kill germs. he discovered a new type of medicine that could treat infections. he discovered the cause of mad cow disease, an emerging disease.

Why is the statement not a hypothesis? sunflowers require soil and plenty of sunlight and water to grow and thrive.