phanikpk wrote:Hello experts,

In the below question, How the modifier can be politicians, but not an ambitious plan. Please explain

Technically, neither politicians nor ambitious plan is the modifier; the modifier is: Finally reaching a decision on an issue that has long been politically charged in the Pacific Northwest.

This modifier belongs to a category of grammatical construction called participial phrases. A participial phrase such as this one modifies the word/phrase that is immediately next to it, in this case politicians (in the original sentence).

p.s. Our book SC Nirvana discusses Participial phrases, their application and examples in significant detail. If you can PM you email, I can send you the corresponding section.