Explanation:

- Mushroom rocks are unique geological formations, often found in deserts, that have a narrower base than their top.

- Option 1: Glacial deposition

- Glacial deposition involves materials being deposited as glaciers melt.

- It usually creates landforms like moraines and drumlins, not mushroom rocks.

- Option 2: Deposition of sea waves

- Sea waves shape coastlines through erosion and deposition.

- This can lead to features like beaches and sand dunes, not mushroom rocks.

- Option 3: Running water erosion

- Running water carves landscapes, forming valleys and canyons over time.

- It doesn't typically create mushroom rocks.

- Option 4: Wind erosion

- Wind erosion wears away the rock base more than the top.

- This is mainly due to sandblasting by wind-carried particles, forming mushroom rocks.