I'm trying to understand the parallelism error in this sentence: "The university's board of trustees, being worried over declining student enrollments and their failing to secure additional funding from the state, has formed a committee to determine what cuts need to be made to staff and programs."
I believe the parallelism error is this: The board is worried over "declining student enrollments" and "their failing to secure". What exactly is the error? "declining student enrollments" is an adverb + adjective + noun structure right? Is "declining" an adverb here? Does "their failing to secure" need to be in that same adverb + adjective + noun structure too?
Can I change "their failing to secure" to "increasingly insecure funding"?
Is "declining" an adverb?