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Welcome to our free-to-use Q&A hub, where students post questions and get help from other students and tutors.

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You can ask your own question or look at similar Biology questions.

If you look at the options, three of them sound plausible and one sounds like the plot of a bad sci-fi movie - that one is your answer!!!

Could you think of how badly some of these factors might be a concern? Obviously 3 of them are a concern - perhaps it would be easier to identify them? The one of least concern would then be your answer.


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