Hi Kalea <3
The word that doesn't signal an example is A, conversely. All the other ones are good "for example" type phrases.
Hope this helps, byee <3
Answer:
D
Explanation:
Cause he said that Gregor has trouble sleeping on his right.
Though I'm not entirely certain, I'm pretty sure your answers are correct.
Copernicus should be the topic, and the central idea should be how he came up with the heliocentric theory. I hope I helped, please tell me if I am incorrect or if you need more help!