Answer:
content-analysis research.
Explanation:
Content-analysis research -
It refers to as the research method involved in order to find the presence or absence of some specific words , sentences , concepts on a given qualitative data , is referred to as the content - analysis research .
The method is used for studying various documents in the form of text , pictures , audio or video .
Hence , from the given scenario of the question ,
The correct answer is content analysis research .