Question: In 1872, the United States created a national park called Yellowstone. The park includes more than two million acres in the three states of Idaho, Montana, and Wyoming. Which statement best explains why national parks have a positive effect on ecosystems?
Answer: National parks limit mining, logging, and hunting.
Hypothesis: national parks have a positive impact on the ecosystem by limiting mining and logging and hunting
Supporting facts: sent1: preventing something decreases the amount of that something sent2: to keep something from happening means to prevent that something sent3: protecting something means preventing harm to that something sent4: logging is when humans cut down trees / forests for wood sent5: positively impacting an organism 's survival increases the likelihood of survival of that organism sent6: cutting down trees has a negative impact on an ecosystem / organisms living in an ecosystem sent7: harming an environment causes harm to the living things / to the organisms in that environment sent8: killing a living thing decreases the number / population size of that living thing sent9: killing means changing a living thing from alive to dead by harming sent10: to inhibit means to prevent sent11: surface mining has a negative impact on the lithosphere / the biosphere / the ecosystem sent12: an animal is a kind of organism sent13: harming an animal species has a negative impact on the population size of that species sent14: ecosystem can mean environment sent15: if something has a positive impact on something else then that something is important to that something else sent16: killing means harming something causing death sent17: national parks limit mining / logging / hunting sent18: organisms are a part of an environment sent19: eating an animal / a plant means killing that animal / that plant sent20: hunting is when a human kills an animal for food / recreation in the wild sent21: an example of protecting the environment is creating protected areas sent22: destroying something causes harm to that something sent23: limiting a source of something tht has a negative impact on something else has a positive impact on that something else sent24: decreasing use of a resource protects that resource sent25: to keep something occurring means to cause that something to occur
Reasoning: [BECAUSE] logging is when humans cut down trees / forests for wood [AND] cutting down trees has a negative impact on an ecosystem / organisms living in an ecosystem [INFER] int1: logging has a negative impact on the ecosystem [BECAUSE] int1 [AND] surface mining has a negative impact on the lithosphere / the biosphere / the ecosystem [INFER] int2: surface mining and logging have negative impacts on the ecosystem [BECAUSE] harming an animal species has a negative impact on the population size of that species [AND] killing means harming something causing death [INFER] int3: killing an animal has a negative impact on that animal's population [BECAUSE] int3 [AND] hunting is when a human kills an animal for food / recreation in the wild [INFER] int4: hunting has a negative impact on animal populations [BECAUSE] an animal is a kind of organism [AND] organisms are a part of an environment [INFER] int5: animals are a part of the environment [BECAUSE] int5 [AND] ecosystem can mean environment [INFER] int6: animals are a part of the ecosystem [BECAUSE] int4 [AND] int6 [INFER] int7: hunting has a negative impact on the ecosystem [BECAUSE] int2 [AND] int7 [INFER] int8: surface mining and logging and hunting have negative impacts on the ecosystem [BECAUSE] int8 [AND] limiting a source of something tht has a negative impact on something else has a positive impact on that something else [INFER] int9: limiting mining and logging and hunting has a positive impact on the ecosystem [BECAUSE] int9 [AND] national parks limit mining / logging / hunting [INFER] int10: national parks have a positive impact on the ecosystem by limiting mining and logging and hunting