Question

The deep valleys cutting across the continental shelf and slope are known as

• A. Submarine Canyons
• B. Seamounts and Guyots
• C. Atolls and Reefs
• D. Mid-Oceanic Ridges

Hint:

The ocean floor has several distinct relief features, including shelves, slopes, ridges and deep cut valleys.

Answer 1

The Correct Option is A

Step 1: Read the description.
We need a feature that is a deep valley cutting across the continental shelf and continental slope.

Step 2: Look at seamounts and guyots.
These are underwater mountains and flat-topped hills, not valleys, so they do not match.

Step 3: Look at atolls and reefs.
These are coral structures near the surface, again not deep cut valleys.

Step 4: Look at mid-oceanic ridges.
These are long raised mountain chains on the ocean floor, not cut-in valleys.

Step 5: Identify the valley feature.
Submarine canyons are steep V-shaped valleys carved into the shelf and slope, usually seaward of big rivers.

Step 6: State the answer.
Hence the deep valleys cutting across the shelf and slope are submarine canyons.
\[ \boxed{\text{Submarine Canyons}} \]