Concept:Aluminium is selected for aircraft construction because its physical and chemical properties make it ideal for flight.
Explanation:Aircraft parts must be strong enough to withstand stress but light enough for efficient flight. Aluminium has a low density, so it is very light, which reduces fuel consumption.
It also quickly forms a thin, tough oxide layer on its surface when exposed to air. This layer protects the metal from further oxidation, giving aluminium excellent resistance to corrosion.
Although aluminium is also malleable and ductile, the key reasons for its use in aircraft are its light weight and corrosion resistance. Hardness, brittleness, and high density would make an aircraft material unsuitable.
Hence, the option that correctly describes these properties is B.
Answer:B. Is light and resists corrosion