The correct answer is B. Ask a question based on an observation
Explanation:
The Scientific Method is a process with multiple steps that allow scientist and individuals to study a phenomenon and prove or disprove a hypothesis. This method includes first observing a phenomenon, defining it and asking questions; research on the topic if necessary; then creating a hypothesis or possible explanation; testing the hypothesis through experiments; analyze and interpret the data; publish the results and finally suing more experiments if necessary. According to this, the step that is first done in the Scientific Method is "Ask a question based on an observation" because this goes before any other steps.
It would be D. Water molecules are split apart and the byproduct of that would be the O2. As energy enters the chloroplasts, the energy excited the H2O molecules and causes them to split
