Question

Mass-wasting processes are

• A. landslides
• B. lahars
• C. avalanches
• D. sand storms

Answer 1

The Correct Option is A, B, C

Identifying Mass-Wasting Processes 

Step 1: Evaluating the Given Options

• (A) Landslides: Correct. **Landslides** are a type of **mass-wasting** process where **rock, soil, and debris** move downslope due to **gravity**.
• (B) Lahars: Correct. **Lahars** are **volcanic mudflows** that involve **rapid movement of water, ash, and debris** down a volcano’s slopes, making them a **mass-wasting** process.
• (C) Avalanches: Correct. **Avalanches** involve the **rapid downslope movement** of **snow and ice**, driven by **gravitational forces**, classifying them as **mass-wasting** events.
• (D) Sandstorms: Incorrect. **Sandstorms** (or **dust storms**) are **wind-driven** processes rather than **mass-wasting**. **Mass-wasting** involves the **gravitational movement** of earth materials, whereas sandstorms involve **wind transport of particles**.

Step 2: Selecting the Correct Answers

Based on the above analysis, the correct mass-wasting processes are:

\[ \mathbf{(A),\ (B),\ \text{and}\ (C)} \]

Final Answer:

Thus, the correct options are: (A), (B), and (C).