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The correct answer is option 3: Stack. A stack is not a coastal depositional feature. Coastal depositional features are created by the deposition of sediment by the action of waves and currents along the coast.
Option 1: Tombolo is a coastal depositional feature. It is a sandy or gravelly isthmus that connects an island to the mainland or another island. It is formed by the deposition of sediment by wave action and longshore drift.
Option 2: Sand bar is also a coastal depositional feature. It is a submerged or partially exposed ridge of sand or sediment that is formed parallel to the coastline. Sand bars can be found in coastal areas such as beaches and barrier islands.
Option 3: Alert - correct answer should be Sea stack. Sea stack is not a coastal depositional feature, but a coastal erosional feature. It is a tall, isolated pillar of rock that is created by the erosive action of waves. Over time, the waves erode the base of a headland, leaving behind a sea stack.
Option 4: Spit is a coastal depositional feature. It is a long, narrow ridge of sand or sediment that is connected to the land at one end and extends into the sea. Spits are formed by the