Explanation:
The internal molecular attraction of a soil, or cohesion, is an important factor in soil mechanics. It refers to the attraction between particles in a soil mass that causes the soil to resist deformation or failure. The cohesion of a soil depends on several factors, including its mineral composition, moisture content, and degree of compaction.

Well-compacted clays have higher cohesion:
- Well-compacted clays have a high degree of internal molecular attraction because of their mineral composition and structure. This makes them particularly resistant to deformation and failure, even under high loads.

Moisture content affects cohesion:
- The moisture content of a soil also affects its cohesion. Cohesion tends to decrease as the moisture content of a soil increases because water tends to weaken the bonds between soil particles. This can lead to reduced shear strength and increased susceptibility to deformation and failure.

Cohesion increases as moisture content decreases:
- Conversely, cohesion tends to increase as the moisture content of a soil decreases. Dry soils typically have a higher degree of internal molecular attraction because there is less water to weaken the bonds between soil particles. This can make them more resistant to deformation and failure, but also more brittle and prone to cracking.

External applied load also affects cohesion:
- The cohesion of a soil can also be influenced by external factors, such as the applied load. When a soil is subjected to an external load, the particles in the soil may be compressed together, increasing their degree of internal molecular attraction and their resistance to deformation and failure.

Conclusion:
In summary, the internal molecular attraction of a soil, or cohesion, is a complex and multifaceted property that depends on several factors. Well-compacted clays tend to have higher cohesion, while cohesion tends to decrease as the moisture content of a soil increases. Cohesion can also be influenced by external factors, such as the applied load.