Biology

The correct answer is C.lipids.

Lipids, such as fats and oils, provide long-term energy storage and also play a crucial role in insulation. They store more energy per gram compared to carbohydrates and are efficient at providing sustained energy over time. Additionally, fats in the body help insulate organs and maintain body temperature.

A.Carbohydrates primarily provide short-term energy and are not used for long-term energy storage or insulation.