Ascientist plans to find out if dams harm a river ecosystem. he interviews 500 environmentalists and 450 of them believe that dams are harmful for the ecosystem. the scientist concludes that 90 percent of people believe that dams are harmful. why is the scientist's conclusion most likely unreliable? very few people were interviewed the source of information could be biased the data about river ecosystems is not accurate the results of the investigation cannot be repeated

I think that the correct answer is:

B. the source of information could be biased

I think this because if 450 out of the 500 all think the same thing, why do the 50 other people think opposite? It could be their opinions - if the scientists don't have facts behind their reasoning. Therefore, making it an opinion.

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this

i don't understand. explain it clearly