Answer: Objective
Explanation: Objective tone is impartial, it does not show any feelings for or against a topic. For example a researcher is expected to conduct a Research and report the findings as it is found irrespective of the individual personal belief.
Objectivity is the report of a real fact that is not influenced by personal opinion or feelings. It is regarded as an impartial report that is free from personal feeling.
Another example is a teacher should report a child academic performance without being partial.