Which one of the following is a synthetic flavor? (IFFCO 2022)

• The silk produced by a silkworm is a single, continuous filament. This is a remarkable feat of natural engineering. Here's why it's important:
-Silk Production: The silkworm produces this continuous filament from its salivary glands.
-Cocoon Structure: The silkworm spins this filament around itself to create its cocoon.
-Silk Properties: The continuous nature of the filament contributes to the strength, luster, and smoothness of silk fibers.