Answer:
Research or Thesis
Given that generally, research or thesis is the methodical, robust analysis and investigation into a particular study or given inquiry topic, which seeks to make use of various materials, experiments, and sources to determine evidence and obtain new findings and conclusions.
Given that generally, research or thesis is the methodical, robust analysis and investigation into a particular study or given inquiry topic, which seeks to make use of various materials, experiments, and sources to determine evidence and obtain new findings and conclusions.Hence, in this case, the correct answer is that "Detailed study of an issue" is otherwise known as RESEARCH or THESIS.