premise: a lake is a kind of body of water sent2: a lawn is a piece of land covered with grass sent3: fertilizers have a positive impact on algae growth sent4: algae is found in bodies of water sent5: lori uses fertilizer on her lawn sent6: runoff flows across land and ends in bodies of water sent7: if fertilizer is used on a land, then the runoff from that land will contain fertilizer.
hypothesis: the population of algae in the lake will increase because of the fertilizer in the runoff