QUES: The third reason is that the use of a substance or substance group has been regulated in law thereby reducing the risk in the use phase

correct the punctuation.

CORRECTED: The third reason is that the use of a substance or substance group has been regulated in law, thereby reducing the risk in the use phase.

QUES: Besides that the more bouncing balls

correct the punctuation.

CORRECTED: Besides that the more bouncing balls.

QUES: Unsure about which type of UDS file you have Do you want to know exactly what it is who created it and how to open it

correct the punctuation.

CORRECTED:
Unsure about which type of UDS file you have? Do you want to know exactly what it is, who created it, and how to open it?