Break apart the prompt. What I would do with this prompt is address three different areas of Terry Malloy's struggles.
Terry's obvious struggle is deciding which is the correct moral path to take in regards to the corruption of the docks. Dedicate body paragraphs to maybe:
- Terry's struggle with Johnny Friendly
- Terry's entrapment between lust (Edie) and danger (defying Johnny Friendly)
- Terry's ultimate struggle of choosing what is morally right (speaking up, or acting through cowardice)
Obviously those are 'rough' ideas to work with. What you need to consider while addressing this prompt is the use of cinematic techniques, which can be implemented in each paragraph. Remember that a cinematic device is not necessarily things like "film-noir". You can use examples like Kazans choice of showing close-up shots of Terry's face to show inner-confusion, or camera shots of Johnny Friendly looking down upon the longshoremen to show struggle on the docks. But you must address 'the emotional and moral struggle of Terry Malloy
' as the dominant point.
Sorry if this isn't much help, it's been a while since I've studied this (Term 1) and I need to review it more. However, I hope that is a little bit of an outline on what you could do.