a question about a part of a reading section

English as a Second Language English Teacher Explanations (ESL Tests)
1

[color=red]a part of reading is:
Detritus feeder-worms, mites, termites, centipedes, snails, crabs ,and even vultures, among [color=blue]others-work like an army to consume detritus and excrete nutrients that fuel an ecosystem.

Q:The word [color=blue]others in the passage refers to

a:debris
b:[color=green]feeders
c:processes
d:nutrients

I don’t know,How can I think or guess the answer is feeder.Please give me some advice to find such answers in TOEFL.

2

The answer is ‘feeders’, not ‘feeder’, and it is mistyped in the sentence. The m-dashes act like parentheses, and all the nouns from ‘worms’ to ‘others’ refer back to the ‘detritus feeders’: they are all examples of detritus feeders.

3

Thank you Mister Micawber. It was very helful for me.