In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.

One of the greatest (1)_________ to textiles is light. It is a form of energy that can fade colour and cause chemical and physical (2)_____________of textile fibres. Exposure to both, natural and ultra violet light can threaten the (3)__________ of textiles. Light damage occurs progressively. You must have noticed at home that the most faded folds of curtains are the first to (4) _______ and fall apart. Fading of colours and alterations of hues are the (5)_________ easy-to-detect signs of light damage.