While travelling to a hilly region, you notice a massive boulder, which was loosened by heavy rains and moved downhill. This has resulted due to which of the following processes?

1. Mass wasting

2. Erosion

3. Weathering

Which of the following statements in respect of landslides are correct?

1. These occur only on gentle slopes during rain.

2. They generally occur in clay-rich soil.

3. Earthquakes trigger landslides.

Consider the following features about a geographical phenomenon :

1. Torrents of snow and ice roaring down a steep mountainside

2. It is hazardous to skiers and mountaineers

3. It involves a mix of falling, rolling, sliding and flowing of materials