Answer:
I think his way of asking is about the isolation and transformation of death.
Explanation:
He is stuck in a pattern of despondency over the loss of his younger sibling, he can't understand his passing and can't discover his way back to investment in the public arena without getting some answers..
Holden longs to understand the cycle that the ducks follow, he somehow equates it with a sense of eternity, where life is renewed each and every spring.