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Answer 1

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SCLERENCHYMA

Sclerenchyma cells have thick, lignified secondary walls, lack cell contents at maturity, and occur throughout all plant tissues. These features make sclerenchyma tissues hard, rigid, and somewhat brittle. Sclerenchyma cells can occur as aggregates within ground tissue (sclereids or stone cells or as elongated fibers. The thickening is made up of a complex carbohydrate, called lignin

wood is made up of xylem sclerenchyma

cork is a dead, protective tissue in plants. Its cells are lined by acomplex carbohydrate called suberin. This gives cork aproperty of being fireproof, impervious to glasses, chemicals, etc...

permenent > simple permenent tissue > sclerenchyma