I think you forgot to add the options but based on my research the correct answer is "It's half on one or two dozen of another." This misquoted idiom from "daughter of invention" is intended to mean that it makes no difference to her. Thank you for posting your question. I hope that this answer helped you. Let me know if you need more help.
One species(the parasite) benefits while the other species (the host) is harmed
I didn't actually understand the question but I will try to solve it.
Length of ribbon = 3 ft
Total number of small pieces = 8
So, length of each piece = 3/8 = 0.375 ft
I think it is the second sentence because its explaining what it looks like; sticky,black tar and its also explaining to you what it does in the summer heat; it shimmers.
Hope this help!