What type of hook is the following sentence? It is estimated that 99% of all the species that have ever lived on Earth are now extinct.

Question

What type of hook is the following sentence? It is estimated that 99% of all the species that have ever lived on Earth are now extinct. 
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question
interesting fact or shocking statistic
quotation
anecdote/story

GPT 3.5 · Answer

interesting fact or shocking statistic