Wooden doors swell up and get stuck during rainy season due to

Wooden doors swell up and get stuck up during rainy season due to .........

Fill in the blanks : Wooden doors usually swell up during rainy season due to ……… .

Doors made up of wood , swell up in rainy season due to

Comment upon the following : Wooden doors and windows swell up during the rainy season .

Jamming of wooden doors and windows takes place during rainy season. Give reason

Statement 1: It becomes difficult to open and shut the wooden doors and windows during rainy season. Statement 2: Wooden doors and windows imbibe water in rainy season and thus their volume is increased.

It is difficult to open and close wooden doors and windows during rainy season. What is the reason?