Final answer:
The most helpful clue in determining the meaning of the word lunar is example.
Step-by-step explanation:
The most helpful clue in determining the meaning of the word lunar is example.
For example, if we know that the word lunar is often used to describe things related to the Moon, we can infer that lunar means something related to the Moon. In the provided example, the question asks about locating a human habitat and doing astronomy on the Moon. This indicates that lunar refers to something related to the Moon.