Coarse soil is generally characterized by having a large particle size. Let's explore this in more detail:

Large Particle Size:
Coarse soil refers to soil that has a relatively large particle size compared to other types of soil. These particles are usually visible to the naked eye and can be felt when touched. Examples of coarse soil particles include sand, gravel, and pebbles. Due to their size, these particles have larger spaces between them, allowing for better drainage and air circulation in the soil.

Cohesiveness:
Cohesiveness refers to the ability of soil particles to stick together. Coarse soil, such as sand, is not cohesive. The individual particles do not stick together and can easily be separated. This lack of cohesion is due to the larger particle size and the presence of spaces between the particles.

Permeability:
Permeability refers to the ability of water to pass through soil. Coarse soil, with its larger particle size and spaces between particles, tends to be highly permeable. Water can easily flow through the soil, which promotes good drainage. This is why sandy soil, a type of coarse soil, is often used for constructing drainage systems or as a base for roads and buildings.

Impermeability:
Impermeability refers to the inability of water to pass through a substance. Coarse soil is not impermeable. In fact, it is the opposite – it allows for easy movement of water through the soil due to its large particle size and resulting high permeability.

Conclusion:
Based on the given options, option C - having a large particle size, is the correct answer. Coarse soil is characterized by its large particle size, which allows for good drainage and high permeability. It is not cohesive and does not have the property of being impermeable.