Answer: Option (C)
Step-by-step explanation:
A tombolo is a depositional feature that is formed when the longshore current, moving parallel to the sea shore, carries the sand long with them and deposits along the shoreline. After this, subsequent backwash carries the sands along with it and deposits at a right angle to the sea shore. This deposited sands and other materials connects the shore to an island and this features are known as tombolo.
Thus, the correct answer is option (C).