It's d because all others have a conjuncyion
It is a simile, because it used "like" in the comparison.
Answer:
Hey there! When someone says to draw a conclusion it basically means to gather the information you have and come to an idea about something. For example, if someone said whats your conclusion on the science experiment, you would look at the facts and answer accordingly, Hope this helps :)))))
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A risk to human health or the enviorment arising from biological work, espically with microorganisms.