A simple behavior lead vs A simple behavior leads

Some examples from the web:

• It's a very simple behavior that shows you the power of this approach.
• Focus on victimology, let behavior lead the way.
• Neal Lowery was a simple schizophrenic living a simple delusion.
• Clearly this wasn't a simple robbery.
• Take a simple film like Edward Scissorhands.
• Enable/disable write support for NTFS with a simple click.
• Anyone can produce salt from seawater with a simple experiment.
• It's a simple herbal remedy.
• Product labelling is a simple way to communicate complex issues.
• This isn't a simple spilled slushy.
• It's a simple delinking spell.
• Let me give a simple example.
• Nuclear energy comes for a simple reason.
• Something we can easily determine with a simple quiz.
• Barca was dispatched to deliver a simple message to Ovidius.
• I think I can face a simple award ceremony.
• A simple recon mission, observe and report.
• I just need... a simple explanation.
• A simple declaration expecting nothing in return.
• A simple meal for a simple man.

Some examples from the web:

• It's a very simple behavior that shows you the power of this approach.
• Focus on victimology, let behavior lead the way.
• Neal Lowery was a simple schizophrenic living a simple delusion.
• Clearly this wasn't a simple robbery.
• Take a simple film like Edward Scissorhands.
• Enable/disable write support for NTFS with a simple click.
• Anyone can produce salt from seawater with a simple experiment.
• It's a simple herbal remedy.
• Product labelling is a simple way to communicate complex issues.
• This isn't a simple spilled slushy.
• It's a simple delinking spell.
• Let me give a simple example.
• Nuclear energy comes for a simple reason.
• Something we can easily determine with a simple quiz.
• Barca was dispatched to deliver a simple message to Ovidius.
• I think I can face a simple award ceremony.
• A simple recon mission, observe and report.
• I just need... a simple explanation.
• A simple declaration expecting nothing in return.
• A simple meal for a simple man.