Final answer:
3. the approximate time period in which he lived. The glossary entry helps the reader understand the approximate time period in which Copernicus lived and the influence of ancient Greek and Roman works on him.
Step-by-step explanation:
The glossary entry helps the reader understand that Copernicus lived during the Renaissance, which was a period of great learning and art in Europe between the 14th and 16th centuries. It also mentions the influence of ancient Greek and Roman works on Copernicus, indicating the importance of these works in shaping his scientific theory. Therefore, option 3 - the approximate time period in which he lived - and option 4 - the ancient Greek and Roman works that influenced him - are the correct answers.