What is define chemical reaction Fr points!!​

a process that involves rearrangement of the molecular or ionic structure of a substance, as distinct from a change in physical form or a nuclear reaction.

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Chemical reaction involves the use of products called reactant to get an acquired result

NB: Chemical reaction may involve the use of a catalyst to trigger the rate of the reaction.

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%).