What grammatical name is given to the expression "The economic importance of wetlands"?​

The functions of lipids include storing energy, signaling, and acting as structural components of cell membranes. ... Lipids also encompass molecules such as fatty acids and their derivatives (including tri-, di-, monoglycerides, and phospholipids), as well as other sterol-containing metabolites such as cholesterol.

Lipids are essential for all life on Earth. They play many important roles in maintaining the health of an organism. Arguably the most important function lipids perform is as the building blocks of cellular membranes. Other functions include energy storage, insulation, cellular communication and protection.

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this like a whole essay