The walls of dams are made stronger and thicker at the bottom. Why?

Plant cell walls are made of

Why the window glass panes of the old buildings are thick at the bottom ?

Why are the walls of hydroelectric dam made thicker at the base?

The cell wall is made up of

Assertion: Glass panes fixed to windows or doors of old buildings are slightly thicker at the bottom than at the top . Reason: Glass is a pseudo solid or supercooled liquid

A ladder is kept at rest with is upper end against a wall and the lower end on the ground. The ladder is more like to slip when a mass stands on it at the top than at the bottom. Why ?

Assertion : Windowpanes of old building become thicker at the bottom than at the top . Reason : Glass is an extremely viscous liquid .

Heart wall is made of

The cell wall of fungi is made of :