Final answer:
The wet, sloping surface that extends from the berm to the shoreline is known as the foreshore, which lies between the high-tide and low-tide lines of a beach and is frequently covered in seawater.
Step-by-step explanation:
The term you are looking for is foreshore. The foreshore is the area on a beach that lies between the high-tide and low-tide lines. It is known for being wet due to the frequent washing over by tides and waves.
The foreshore is part of a larger coastal zone that also includes the backshore, nearshore, and other areas. The backshore is typically dry and is the part of the beach located between the foreshore and the coastline, which could feature dunes or berms and is affected by waves only during high tide or storm surges.
The nearshore extends from the low-tide line to the area where sediment settles beyond the influence of the waves' breaking force. In contrast to the foreshore's wet conditions, the nearshore encompasses a broader range of underwater bed forms, like ripples and sand ridges, which are shaped by currents and waves. Coastal geography and processes are complex and involve the constant movement and deposition of sediment, including during events such as overwash or when landforms like deltas form at the mouths of rivers.