Which kingdom is characterized by organisms that generally have cell walls made of chitin?

The kingdom characterized by organisms that generally have cell walls made of chitin is Fungi. Chitin is a polysaccharide that serves as a structural component in the cell walls of fungi, providing rigidity and strength. This unique feature distinguishes fungal organisms from other kingdoms. For example, while plants have cell walls made of cellulose, and animals lack cell walls altogether, fungi possess chitin, setting them apart in the classification of living organisms. Fungi include a diverse range of organisms such as molds, yeasts, and mushrooms, all of which rely on chitin for the integrity of their cell structure.