Answer: Option D.
Glue adjacent cells together.
Explanation:
The middle lamella of plant is the outermost layer of the matured plants cell wall and it is made up of calcium and magnesium pectates. It is the layer that glue to adjacent cells wall together. The primary walls that are glued together is the cellulose layer that is shedd by a growing and dividing cells. The pectins In plants form a layer between the adjacent cells.
