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The purpose of the source tries to explain why a given source was used while the context explains the setting.
It is the energy source. It is using as the energy source.
purpose
It is energy source
To evaluate the purpose of an online source, ask, "What is the intended audience, and what message or information is the source trying to convey?" This question helps determine whether the source is meant to inform, persuade, entertain, or sell something. Additionally, consider the credibility and potential biases of the author or organization behind the source, as these factors can significantly influence its purpose.
The main source of propulsion.
So u can run
The purpose of cables are to transfer electricity from some kind of power source to the object it is powering.
Shadows do not have a purpose, they are just the absence of light created when an object blocks a light source.
It is a source of revenue for the NFL.
it is used for re-compilation of your source file
To give credit to the original source