The answer is B. Colour : Faded.

Muffled is a word that describes sound that is not clear or distinct. It can be caused by a number of things, such as a thick curtain or a wall that is blocking the sound. Faded is a word that describes colour that has lost its intensity. It can be caused by a number of things, such as exposure to sunlight or washing.

The other options are not as closely related to the word "muffled". Moisture is the presence of water in the air or on a surface. It can be caused by a number of things, such as rain or sweat. Despair is a feeling of hopelessness or extreme sadness. It can be caused by a number of things, such as the loss of a loved one or a serious illness. Odour is a smell. It can be caused by a number of things, such as food or perfume.

In conclusion, the answer to the question "Sound : Muffled A. Moisture : Humid B. Colour : Faded C. Despair : Anger D. Odour : Pungent" is B. Colour : Faded.