Final answer:
The correct answer to the student's question 'Which of these is an example of part of a scientific theory?' is 'B. An explanation of how plants use carbon for photosynthesis', as it embodies a part of a scientific theory.
Step-by-step explanation:
The student's question, which is "Which of these is an example of part of a scientific theory?", pertains to identifying what qualifies as an aspect of a scientific theory. A scientific theory is a comprehensive explanation of natural phenomena that is extensively supported by evidence. Now, examining the options provided:
- A. This is a statement of a scientific law rather than a theory.
- B. An explanation of how plants use carbon for photosynthesis is indeed part of a scientific theory as it explains how a natural process works and is supported by extensive evidence.
- C. This is a policy, not a scientific explanation.
- D. This is a prediction based on a hypothesis, not a broad theory substantiated by a substantial body of evidence.
Hence, the correct answer to the student's question from the given options is B.