D. Catalyst
A catalyst is a reason for an event to occur.
Answer:
First
Explanation:
It is the beginning of the explanation, so you could not use any other transitions listed
<span>The theme of chapter 4 "The Cylinder Opens" is this feeling where, for once, Victorian society has to admit they don't have all the answers about the universe. There's this overwhelming feeling of disgust and horror from the people as this repulsive, yet somehow advanced, being emerges from the cylinder, asserting this crushing feeling that we don't understand everything.</span>
1. Went, Went
2. started
3. Finished, went
4. finished, watched
5. turned, made
6. came, disappeared
7. I didn’t, saw
8. switched, left
9. went, did
10. bought, saved
11. went
12. went
13. didn’t go
14. did, manage, left, got
15. got, called