Soap consists of

Option 1 -> Alkali salts of higher fatty acids (like sodium or potassium stearate) formed through saponification of fats with alkali.

Option 2 -> These are components of cement/building materials, not soap.

Option 3 -> Sodium silicate (water glass) is not a soap component; this describes glass-related compounds.

Option 4 -> These chemicals are used in fertilizers and industrial applications, not soap manufacturing.

Hence, Option 1: Alkali salts of higher fatty acids -> Soap is produced by the saponification reaction where fats or oils (triglycerides) react with strong alkali (NaOH or KOH) to form glycerol and alkali salts of long-chain fatty acids (R-COONa or R-COOK), which constitute soap -> correct