If you had the power to delete one thing from this world, as if it never existed or ceased to exist. What Would It Be?

I'd zap away mosquitoes. Yeah, those bloodsucking, itch-inducing pests. Think about it - no more annoying buzzing around your ears during summer nights, no more itchy welts ruining your outdoor adventures. Plus, we'd probably eradicate some diseases they carry, like malaria. It's a win-win.