It is the line where the approach meets the lane.
When you go past the foul line in bowling, it is called a foul.
a foul is when you step over the black line when the floor meets the bowling lane
Foul Line
60 feet from foul line to center of head pin.
well you do this and that and that constituts a foul in bowling stepping over the foul line at the lane before you let go
well you do this and that and that constituts a foul in Bowling stepping over the foul line at the lane before you let go
It is called the Foul Line
It is 60 feet from the foul line to the bowling pins.
It is called a foul. And the line is called a foul line.
Foul line
60 feet
15 feet