Here's why:

* Lecithin's structure: Lecithin is a phospholipid, containing both hydrophilic (water-loving) and hydrophobic (water-repelling) components. The hydrophobic part of lecithin is attracted to non-polar solvents like methylene chloride.

* Methylene chloride's properties: Methylene chloride is a non-polar solvent, meaning it has no distinct positive or negative poles. This makes it a good solvent for non-polar substances like the hydrophobic part of lecithin.

Therefore, the hydrophobic part of lecithin interacts favorably with methylene chloride, leading to its solubility.