Here's why:

* Long hydrocarbon chain: Fatty acids are characterized by a long, unbranched chain of carbon atoms with hydrogen atoms attached.

* Carboxylic acid: They have a carboxyl group (-COOH) at one end of the chain.

* Natural source: Fatty acids are naturally occurring and are found in fats and oils from plants and animals.

Examples of common fatty acids:

* Palmitic acid: Found in palm oil, animal fats, and dairy products.

* Stearic acid: Found in animal fats, cocoa butter, and shea butter.

* Oleic acid: The most abundant fatty acid in olive oil and other vegetable oils.

* Linoleic acid: An omega-6 fatty acid found in vegetable oils like sunflower and soybean oil.

Let me know if you'd like to learn more about specific fatty acids or their properties!