Question: Which of the following was probably most important in the formation of dark, fertile soil that is good for farming?
Answer: plant decomposition
Hypothesis: plant decomposition is important for the formation of fertile soil
Supporting facts: sent1: decaying plant is a kind of organic matter sent2: low quality soil has a small / a low number of nutrients sent3: decomposition is when a decomposer recycles / returns nutrients / nitrogen from dead organisms to the soil by eating those dead organisms sent4: high quality / rich / good soil has a high number of nutrients / amount of nitrogen sent5: a microorganism is a kind of decomposer sent6: fertile soil is high in quality sent7: dead organisms decay sent8: if something requires something else then that something else is important to that something sent9: when plant parts are mixed with soil then the amount of oganic matter in the soil will increase sent10: a plant requires soil for survival / to grow sent11: if something is transported to a place then the amount of that something in that place increases sent12: if something is made of something else then the formation of that something requires that something else sent13: dead organisms are the source of nutrients for decomposers sent14: if something has something else then that something might be made of that something else sent15: to decompose means to decay sent16: returning something is a kind of method for transporting something sent17: soil is made of solid particles sent18: decay has a negative impact on a thing sent19: to decompose means to separate sent20: a bacterium is a kind of decomposer sent21: an organism is a source of organic matter sent22: as amount / size of something increases , the intensive properties of that something will not change sent23: a decomposer is usually a bacterium / fungus sent24: a plant is a kind of organism sent25: organic matter is a source of nutrients in soil
Reasoning: [BECAUSE] high quality / rich / good soil has a high number of nutrients / amount of nitrogen [AND] fertile soil is high in quality [INFER] int1: fertile soil has a high amount of nutrients / nitrogen [BECAUSE] int1 [AND] if something has something else then that something might be made of that something else [INFER] int2: fertile soil is made of high amounts of nutrients / nitrogen [BECAUSE] int2 [AND] if something is made of something else then the formation of that something requires that something else [INFER] int3: high amounts of nutrients / nitrogen are required for the formation of fertile soil [BECAUSE] int3 [AND] if something requires something else then that something else is important to that something [INFER] int4: high amounts of nutrients / nitrogen are important for the formation of fertile soil [BECAUSE] if something is transported to a place then the amount of that something in that place increases [AND] returning something is a kind of method for transporting something [INFER] int5: if something is returned to a place then the amount of that something in that place increases [BECAUSE] int5 [AND] decomposition is when a decomposer recycles / returns nutrients / nitrogen from dead organisms to the soil by eating those dead organisms [INFER] int6: decomposition of dead organisms increases the amount of nutrients / nitrogen in soil [BECAUSE] int4 [AND] int6 [INFER] int7: decomposition of dead organisms is important for the formation of fertile soil [BECAUSE] int7 [AND] a plant is a kind of organism [INFER] int8: plant decomposition is important for the formation of fertile soil