................... term refers to the ethical obligation of researcher to give credit to the ideas, words or work of others.
Attribution
Attribution is the act of naming the source from which an idea, a form of words or a piece of work has been taken, and it is what converts borrowed material into legitimate scholarship. Every in-text citation and every reference entry is an act of attribution, and the obligation to perform it is what the stem describes.
Acknowledgement is a courtesy rather than a source credit. In the acknowledgements section a researcher thanks a supervisor, a funding body, a laboratory or a colleague who gave assistance. Those people supplied help, not the ideas or words being reproduced, so thanking them does not discharge the duty to cite a source.
Plagiarism is the failure to attribute — presenting another's ideas, words or work as one's own. It names the offence, not the obligation, so it cannot be the term asked for.
Authorship concerns who is entitled to be listed as a creator of a work, resting on substantial intellectual contribution and accountability for the content. It settles credit within a research team, not credit owed to outside sources.
Hence the term is attribution.
Assertion (A) : In recent time, it is easier to copy and paste the contents from a digital document for which people knowingly avoid to credit the source. Hence, increased access to digital documents has provided a means for increase of plagiarism.
Reason (R) : Software-assisted detection tools like iThenticate, Turnitin, etc. now allow vast collections of online documents to be compared to each other making successful detection of plagiarism.