Which graph below illustrates positron emission? 
Definitions:
Rotates
The action of an object turning or spinning around an axis, either in a circular or semi-circular direction.
Mechanism
A system of moving parts designed to perform a specific function within a larger machine or device.
Abbreviation
An abbreviated version of a word or phrase.
Bill of Materials
A comprehensive list of raw materials, components, and assemblies required to construct, manufacture, or repair a product or service.
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