How many pairs of legs do arachnids have?

Arachnids are a class of joint-legged invertebrates that are characterized by having eight legs. This is a defining feature of this class, which includes spiders, scorpions, ticks, and mites. Each arachnid has four pairs of legs, which distinguishes them from insects, who only have three pairs (six legs in total). The presence of four pairs of legs is integral to their classification in the animal kingdom and is vital for their locomotion and predatory abilities. Therefore, stating that arachnids have four pairs of legs aligns with the biological classification and anatomical structure of these creatures.