I have multiple OS versions on my Mac Pro. Is there a way I can edit and clean them up.

I have three different OS's on my Mac Pro and m having trouble isolating them. Is tgere anyway I can edit that startup disk program to delete bad options and identify which disk holds which operating system.

Here is a snapshot of both drives in Disk Utility.

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             3. MacBook Pro (Mid/Late 2007 or newer) - Model Identifier 3,1 or later
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    parental control: Apple Support Communities

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