Final answer:
The correct phrase that completes the sentence is "Yo sé que" and it conveys certainty and knowledge.
Step-by-step explanation:
The correct phrase that best completes the sentence “tenga los libros de biologia” is OB. Yo sé que. This phrase translates to “I know that” in English. The phrase conveys certainty and knowledge that the person knows about the biology books.
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