The reading is spurred on the line, because it is open after a thousand mudds

The answer is: it is distinguished Reading on the line because it is open after a thousand extension.

The reading recitation is written with the hamza on the line because it is open and is preceded by an alif of the silent madd. This is one of the cases of writing the hamza on the line in Arabic. It is important to make sure to write the hamza when it is open. This ensures that the reading is pronounced correctly and that the meaning is conveyed accurately.