The correct answer is option 4. Soap molecules bind with the soil, lift the soil, and keep it suspended so that it can be rinsed away.

Let`s dissect each option to better understand why option 4 is the correct answer.

Option 1 states that soap dissolves the soil as such. This is not entirely accurate as soap does not directly dissolve the soil. It works by loosening the dirt particles from the cloth.

Option 2 mentions that soap reacts with soil and converts them into soluble silicates. While it is true that soap reacts with certain components of the soil, such as oils and grease, it does not convert them into soluble silicates. The reaction helps in breaking down the dirt, but soap does not convert it into a different compound.

Option 3 suggests that soap takes away the oily part of the soil and separates it from the cloth. This statement is partially correct. Soap does remove oily substances from the cloth, but it also helps in lifting other types of dirt particles, not just oily ones.

Option 4 accurately describes how soap removes dirt from cloth. Soap molecules surround and bind to the dirt particles, and when agitated or rinsed, the soap lifts the dirt from the cloth and keeps it suspended in the water.