in the picture above, the big w is in ocean water, while the little w is in water in a bay cut off from the ocean by the bar indicated by the pink dashed arrow. a stream flows toward the bay along the blue arrow, and coastal bluffs are indicated by the dashed yellow arrow. what probably happened here? group of answer choices the navy dammed the stream valley to keep enemy submarines from sneaking in and launching missile attacks on the secret underground base under the stream. sediment has been eroded from the land by waves crashing against the bluffs, and the sediment has been transported along the shore by longshore drift to build the bar. sediment supplied by the stream has piled up to build the bar that separates the stream from the ocean. a sinkhole opened behind the beach, and the stream slumped into the hole, leaving the bar.