Question: The danger posed to fish in an aquarium by an overpopulation of bacteria caused by an algal bloom is most likely a
Answer: reduction in oxygen levels.
Hypothesis: an algal bloom is a danger to fish because it decreases the oxygen levels in an environment
Supporting facts: sent1: a required resource being low in availability has a negative impact on the something that requires that resource sent2: a problem / a concern has a possible negative impact on a thing sent3: requiring too much of a resource has a negative impact on the availiability of that resource sent4: if an organism dies then the population of that organism will decrease sent5: an algal bloom causes an increase of bacteria in an environment sent6: if a living thing is destroyed then the resources used by that living thing will become available sent7: decreasing something positive has a negative impact on a thing sent8: decreasing something negative has a positive impact on a thing sent9: oxygen levels are a measure of the amount of oxygen in an environment sent10: if something causes a process then that something is required for that process sent11: to depend on / to rely on / to need means to require sent12: as a population of organisms increases , the resources used by those organisms will decrease sent13: the amount of something is similar to the availability of something sent14: if an animal 's / organisms habitat no longer exists / ceases to exist then that animal / that organism will die sent15: danger has a negative impact on a thing sent16: a fish is a kind of animal sent17: humans changing ecosystems / environments usually has a negative impact on an ecosystem / organisms living in an ecosystem sent18: an bacterium requires oxygen for survival / to breathe sent19: water contains dissolved oxygen sent20: harming an animal species has a negative impact on the population size of that species sent21: positively impacting an organism 's survival increases the likelihood of survival of that organism sent22: if an organism eats something then that something is a source of frood to that organism sent23: an animal / bacterium requires oxygen for survival / to breathe sent24: a lack of something that a living thing requires prevents the survival of that living thing sent25: if something has a negative impact on the survival of an organism then that organism may be unable to survive
Reasoning: [BECAUSE] as a population of organisms increases , the resources used by those organisms will decrease [AND] an bacterium requires oxygen for survival / to breathe [INFER] int1: as a population of bacteria increases the amount of oxygen will decrease [BECAUSE] int1 [AND] an algal bloom causes an increase of bacteria in an environment [INFER] int2: an algal bloom causes the amount of oxygen in an environment to decrease [BECAUSE] a fish is a kind of animal [AND] an animal / bacterium requires oxygen for survival / to breathe [INFER] int3: fish require oxygen to survive [BECAUSE] int3 [AND] a required resource being low in availability has a negative impact on the something that requires that resource [INFER] int4: oxygen being low in availablilty has a negative impact on fish [BECAUSE] int4 [AND] danger has a negative impact on a thing [INFER] int5: oxygen being low in availabliltyis a danger to fish [BECAUSE] int2 [AND] int5 [INFER] int6: an algal bloom is a danger to fish because it decreases the amount of oxygen in an environment [BECAUSE] int6 [AND] oxygen levels are a measure of the amount of oxygen in an environment [INFER] int7: an algal bloom is a danger to fish because it decreases the oxygen levels in an environment