A. Being one of the most basic operations in glasswork is breaking glass to a desired length.
B. One of the most basic operations in glasswork is breaking glass to a desired length.
C. When breaking glass to a desired length, one of the most basic operations is in glasswork.
Breaking glass to a desired length, one of the most basic operations in glasswork, is what is being described
Being one of the most basic operations in glasswork is breaking glass to a desired length.
Option A.
Step-by-step explanation:
The other way of writing the sentence which has been given in the question is writing the sentence given in this option A which says that one of the most basic operations in glasswork is breaking glass to desired length.
This will not make it lose it's meaning or the effectiveness of the sentence in the question.