Answer: FAT

Fat refers to a type of nutrient that is a major component of a ketogenic diet. It is one of the three macronutrients, along with carbohydrates and proteins. Fat is a concentrated source of energy, providing more than twice as many calories per gram as carbohydrates or proteins. It serves various functions in the body, such as insulation and protection of organs, hormone production, and absorption of fat-soluble vitamins. In a ketogenic diet, fat is consumed in higher amounts to encourage the body to use fat as its primary fuel source.

Note: The provided meaning of the answer is for the latest New York Times crossword puzzle clue: Avocados are rich in it. Explanations are generated by AI and may be inaccurate.