Final answer:
When working with electricity, it is safest to wear clothing made of cotton or wool because these materials do not conduct electricity well and are less likely to generate static charges, as opposed to synthetic materials or metals.
Step-by-step explanation:
When working with electricity, the clothing you are wearing next to your skin should ideally be made from materials that do not enhance conductivity or hold a static charge. Among the options provided, the best choices would be cotton or wool, as these materials are less likely to generate static electricity compared with synthetic materials. Metal should be avoided entirely as it is a strong conductor of electricity and can introduce risks of electric shocks.
Our bodies are relatively good conductors due to the water content in our tissues. Insulating clothing materials such as cotton or wool help to provide a layer of protection against accidental currents. It is crucial to wear clothes that do not conduct electricity well when working with electrical devices or in environments where electrical hazards are present.