The act or statement describing something you have seen or heard is Observations. Option E is the answer.
What is Observational research?
observational research makes use of inference from what is seen.
It makes use of many approach it include which behavior observation, physical and visual examination.
It also uses direct observation where nature or natural things are observed.
Therefore, The act or statement describing something you have seen or heard is Observations. Option E is the answer.
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