DO 178B - What is the difference between review and verification?

#1
Hello All,
In DO178B process, we will prepare requirement review checklist as per "Table 3 Verification of outputs of software requirement process" but table heading is verification of output. Then what is the difference between review and verification?Usually we will verify the requirements through high level testing.

In software V&V means Verification of Verification. What is the difference between first "Verification" and second "Verification"?
 

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