Question

which macromolecule stores energy, insulates us, and makes up the cell membrane? carbohydrates lipids nucleic acids proteins

Explanation:

Lipids have multiple functions. They store energy in the form of fat, provide insulation to maintain body temperature, and are a major component of cell membranes in the form of phospholipids. Carbohydrates are mainly for quick - energy supply, nucleic acids store genetic information, and proteins have diverse functions like catalysis and structure - building but not the main functions described in the question.

Answer:

B. lipids