The correct answer is E. All the above.
Gravel is a type of unconsolidated sediment that is composed of particles that are larger than sand and smaller than cobbles. The size of gravel particles ranges from 2 to 20 millimeters. Gravel is typically composed of rounded or angular rock fragments, but it can also contain other materials such as pebbles, cobbles, and boulders.
Gravel is a common material in the natural environment, and it is also used in a variety of construction and landscaping applications. Gravel is often used as a base material for roads, driveways, and sidewalks. It is also used in landscaping to create retaining walls, flower beds, and other features.
Gravel is a versatile and durable material that can be used in a variety of applications. It is a good choice for projects that require a strong and stable foundation.
Here is a brief explanation of each option:
- A. Are cohesionless aggregates: Gravel is a type of unconsolidated sediment, which means that it is not held together by any chemical bonds. The particles in gravel are held together by friction and gravity.
- B. Vary in size between 2 to 20 mm: The size of gravel particles ranges from 2 to 20 millimeters. This means that gravel is larger than sand but smaller than cobbles.
- C. Never swell when they come into contact with water: Gravel is a non-swelling material. This means that it does not expand when it comes into contact with water.
- D. Seldom shrink when dried: Gravel is a non-shrinking material. This means that it does not contract when it dries out.