occurs when a fielder fails to make a play

Answer 1

When a fielder fails to make a play in baseball or softball, it is often referred to as an "error." An error is charged to a fielder when they make a misplay that allows a runner to advance bases or reach base safely when they would have been put out had the play been made correctly. Errors can occur in various situations, such as misfielding a ground ball, dropping a fly ball, or making a bad throw.