Which of the following is a common use of carbon fibre?

Carbon fibre is widely used in aerospace applications due to its unique properties, including high strength-to-weight ratio, rigidity, and resistance to fatigue. These characteristics make carbon fibre an ideal material for aircraft components, such as wings and fuselages, because they can significantly reduce weight without sacrificing strength. This reduction in weight is crucial for improving fuel efficiency and performance in aviation.

While construction material and insulation offer their own benefits, they are not the primary applications for carbon fibre. Packaging does not typically require the specific advantages that carbon fibre provides, making aerospace the most prominent and relevant application among the options listed.