Q. Which of the following is/are usually an essential part of any complete scientific investigation ( more than one answer is possible) : A. Defining a research question B. Stating a Hypothesis C. Conducting an experiment D. Having a research methodology E. Making observation F. Stating conclusions

The essential parts of a complete scientific investigation typically include:<br /><br />A. Defining a research question<br />B. Stating a Hypothesis<br />D. Having a research methodology<br />E. Making observations<br />F. Stating conclusions<br /><br />These components help ensure that the investigation is systematic, objective, and replicable. Conducting an experiment (C) is often a crucial part of the process, but not all scientific investigations necessarily involve experimentation; some may rely on observational studies or other methods