Final answer:
Lipids, water, nucleic acids, and vitamins are essential nutrients.
Step-by-step explanation:
The essential nutrients are lipids, water, nucleic acids, and vitamins. Lipids, also known as fats, are important for energy storage and insulation. Water is vital for maintaining hydration and facilitating metabolic processes. Nucleic acids, such as DNA and RNA, are responsible for storing and transmitting genetic information. Vitamins are organic compounds that are necessary for various biochemical reactions in the body.