The depressions formed due to melting of large blocks of ice in the outwash plains are called:

Question

Accepted Answer

The depressions formed due to the melting of large blocks of ice in outwash plains are called **Kettles**.

Here's why Option 1 (Kettle) is the correct answer and why the other options are incorrect:

*   **Option 1: Kettle (Correct)** - Kettles are indeed depressions formed in glacial outwash plains (or till) when buried blocks of ice left behind by a retreating glacier melt. The melting ice leaves behind a depression, which can then fill with water, forming a kettle lake or simply remain as a dry depression. This perfectly aligns with the question's description.

*   **Option 2: Hummock (Incorrect)** - Hummocks are general terms for small hills or mounds. While they can be found in glacial landscapes, they are not specifically formed by the melting of ice blocks in outwash plains. They are more broadly related to uneven terrain.

*   **Option 3: Kame (Incorrect)** - Kames are irregularly shaped hills or mounds composed of sand, gravel, and till that accumulate in depressions on a retreating glacier. They are formed by sediment deposition from meltwater streams *on* or *within* the glacier, not by the melting of large ice blocks *within* an outwash plain.

*   **Option 4: Sandar (Incorrect)** - A sandar (also called an outwash plain) is a broad, gently sloping plain composed of sorted sediment deposited by meltwater streams flowing from a glacier. It's the *location* where kettles can form, not the depression itself. It's the plain, not the depression.