The NYS 2100 commission, one of four that Mr. Cuomo established in the aftermath of Hurricane Sandy, is tasked with evaluating and recommending changes to the state’s infrastructure to better prepare for the harsher weather expected in the future. Its broad 175-page study says the state should consider storm barriers with movable gates that would span the Narrows, at a cost of tens of billions of dollars, and endorses a variety of “soft infrastructure” investments like building dunes and wetlands and oyster reefs, which were more prevalent along New York’s coastline in the 1800s.