Which sentence best illustrates the falling action in "R.M.S. Titanic"?

"In the crow’s-nest, lookout Frederick Fleet and his partner, Leigh, gazed down at the water, still and unruffled in the dim, starlit darkness."

"Her bulk dwarfed the ships near her as longshoremen singled up her mooring lines and cast off the turns of heavy rope from the dock bollards."

"The dense throngs stood quiet as the first survivor stepped down the gangway."

"A sudden sharp hiss—a streaked flare against the night; Boxhall sends a rocket toward the sky."