Why is the amide linkage in sphingolipids significant compared to the ester linkage in glycerolipids?

The amide linkage is only found in glycerolipids, not sphingolipids.

The amide linkage is less stable than the ester linkage, leading to easier breakdown.

The amide linkage provides greater stability and resistance to hydrolysis compared to the ester linkage.

The amide linkage allows for more variable fatty acids compared to the ester linkage.