When you are balancing chemical reactions (equations'), what must you never touch? the normal-looking numbers to the left of the molecules or compounds. the coefficients, the numbers in subscript

The correct answer option is: the number in subscript.

When you are balancing any chemical equation, you must never touch or change the number in subscript of the molecule of a chemical or compound as it will upset the composition.

the numbers in subscript

Explanation:

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i'm pretty sure it is letter c.) car

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).