Final answer:
The components that can be found in both comparative and experimental investigations but are never found in descriptive investigations are question, hypothesis, variables, and prediction.
Step-by-step explanation:
The components that can be found in both comparative and experimental investigations but are never found in descriptive investigations are:
- Question: Both comparative and experimental investigations require a specific question to be answered or a problem to be solved.
- Hypothesis: Both types of investigations involve the development of a hypothesis, which is a tentative assumption based on what is already known.
- Variables: Comparative and experimental investigations involve the identification and manipulation of variables to study their effects.
- Prediction: Both investigations may require prediction of the expected outcomes.