Question

fibers - like those of cotton or linen - used in making clothing are actually dead cells that belong to which of the three types of ground tissue?

fibropenchyma
parenchyma
collenchyma
sclerenchyma

Explanation:

Ground tissue in plants has three types: parenchyma, collenchyma, and sclerenchyma. Parenchyma cells are living and have thin - walled cells. Collenchyma cells are living and have unevenly thickened primary walls. Sclerenchyma cells have thick, lignified secondary walls and are often dead at maturity. Fibers used in making clothing like cotton or linen are sclerenchyma cells.

Answer:

sclerenchyma