Final answer:
The subcutaneous layer is composed of areolar connective tissue and adipose tissue, which provide support, storage of energy, and insulation for the body.(Option e)
Step-by-step explanation:
The composition of the subcutaneous layer, also known as the hypodermis, includes both areolar connective tissue and adipose tissue. The areolar tissue is a loose connective tissue that contains a variety of cells and fibers, providing a flexible matrix that gives support and binds tissues together. Adipose tissue, on the other hand, is specialized in storing energy in the form of fat and insulates the body. Adipose tissue is made up of adipocytes, which are cells that contain large amounts of lipid droplets.
In the context of the available options, the correct answer to the composition of the subcutaneous layer is 'e. areolar connective tissue and adipose connective tissue'. This layer does not consist of dense regular or dense irregular connective tissue, which are typically found in regions requiring more strength, like the dermis layer of the skin.