Naturally occurring fatty acid has . . . . . . . . configuration

Naturally occurring fatty acid has Cis configuration.
Two polyunsaturated fatty acids, linoleic and α-linolenic acids are termed essential fatty acids because humans must obtain them from their diets.
In the Cis configuration, the hydrogen atoms attached to the double bond point in the same direction, while in the trans-configuration, the hydrogen atoms are located on opposite sides.