Final answer:
3) Lipid is the material found in cells that supports and binds together, stores energy as fat, and provides immunity to disease.
Step-by-step explanation:
3)Lipids are the materials found in cells that support and bind together cellular structures, store energy as fat, and provide immunity to disease. Lipids are a diverse group of molecules that include fats, phospholipids, and steroids. They serve crucial roles in cell membranes, act as energy reservoirs, and contribute to the immune response by forming components such as phospholipid bilayers and signaling molecules.
*Firstly*, lipids play a vital role in providing structural support to cells. Phospholipids, a type of lipid, are major components of cell membranes, forming a lipid bilayer that surrounds and protects the cell. This structural role is essential for maintaining the integrity and function of cells.
*Secondly*, lipids serve as a significant energy storage form in the body. Fats, a subtype of lipids, store energy in a highly efficient manner. When the body needs energy, it can break down these stored fats to generate ATP, the primary energy currency of cells.
*Thirdly*, lipids contribute to immunity. Certain lipids, like phospholipids, are involved in the formation of immune cell membranes. Additionally, lipids such as eicosanoids play a role in signaling and inflammation, influencing the immune response.
In conclusion, lipids are a multifunctional class of molecules crucial for cellular structure, energy storage, and immune function. Therefore, the correct answer is option 3) Lipid.