Which of the following best describes FeBr3 in the reaction shown below? 
Definitions:
Mesozoic Era
A major subdivision of geologic time from 251 million years ago (Ma) to 65 Ma; characterized by dinosaurs.
Jurassic Period
A geologic period and system that occurred about 201 to 145 million years ago, known for the prevalence of dinosaurs and the breakup of the supercontinent Pangea.
Numeric Age
Geologic age of a rock, sediment, fossil, or event calculated in thousands, millions, or billions of years before present; synonym: absolute age.
Actual Age
The precise age or date of an object or event, usually determined through radiometric dating or other scientific methods.
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