Sclerenchyma
Sclerenchyma is a type of plant tissue that provides mechanical support to the plant. It consists of cells with thick, lignified cell walls. These cell walls are rigid and provide strength and rigidity to the plant.

Trachea
Trachea, also known as xylem vessels, are part of the vascular tissue system in plants. They are responsible for the transport of water and minerals from the roots to the other parts of the plant. The cells in trachea are dead at maturity and have no protoplasm.

Epidermis
Epidermis is the outermost layer of cells in plant organs such as stems, leaves, and roots. It provides protection against environmental factors such as water loss, pathogens, and mechanical damage. The epidermal cells are living at maturity and contain protoplasm.

Collenchyma
Collenchyma is a type of plant tissue that provides mechanical support to the plant. It consists of cells with thickened cell walls, which are unevenly thickened due to the deposition of cellulose and pectin. The collenchyma cells are living at maturity and contain protoplasm.

Explanation:
The plant tissues that do not possess living protoplasm at maturity are sclerenchyma. Sclerenchyma cells have thick, lignified cell walls that provide strength and rigidity to the plant. These cells are dead at maturity and lack living protoplasm. This is why option A, sclerenchyma, is the correct answer.

On the other hand, trachea, epidermis, and collenchyma all have living protoplasm at maturity. Trachea cells are responsible for water and mineral transport, and they are dead at maturity. However, they still contain protoplasm during their functional stage. Epidermal cells provide protection and are living at maturity. Collenchyma cells provide mechanical support and also contain living protoplasm.

Therefore, the correct answer is option A, sclerenchyma, as it is the only plant tissue that lacks living protoplasm at maturity.