Yes, it is.
an alliteration occurs when a series of words in a row, or close together, have the same first consonant sound.
Indecency is the correct choice here.
Hope this is helpful!
<span>indirect characterization
This shows the character's feeling and ideals, which gives the reader a view of how the character thinks. The quote doesn't say anything directly about the character, but the reader can see how he feels about the Burmese (positively) versus the British (negatively but that he's not willing to show it.</span>