Which of the following tissues has dead cells?

Write true $(T)$ or false $(F)$ for the following statements:
$(a)$ Epithelial tissue is a protective tissue in the animal body.
$(b)$ The lining of blood vessels,lung alveoli,and kidney tubules are all made up of epithelial tissue.
$(c)$ Epithelial cells have a lot of intercellular spaces.
$(d)$ The epithelial layer is a permeable layer.
$(e)$ The epithelial layer does not allow the regulation of materials between the body and the external environment.

Which is not a function of epidermis?

Identify the following tissues:
$(a)$ The epithelial tissue which has pillar-like tall cells.
$(b)$ The cells of this tissue are filled with fat globules.
$(c)$ The movement of this tissue pushes the mucus forward to clear the respiratory tract.
$(d)$ It gives buoyancy to the lotus to help it float.
$(e)$ This tissue is present in lung alveoli.

$(a)$ Why do sclerenchyma cells have a narrow lumen?
$(b)$ Where are these tissues present and why?

State whether the following statement is true or false:
The cells of collenchyma are living,elongated,and irregularly thickened at the corners.