Option C is correct. Chitin is a important issue of the exoskeleton of insects.
Chitin serves as a protecting protecting and mechanical assist to soft-bodied organisms producing it. In insects and arthropods, chitin is a vital component of their exoskeleton.
Chitin is additionally present in insect body wall, intestine lining, salivary glands, mouth parts, and muscle attachment points.
Chitin is one of the most necessary biopolymers in nature. It is usually produced through fungi, arthropods and nematodes. In insects, it functions as scaffold material, aiding the cuticles of the epidermis and trachea as properly as the peritrophic matrices lining the gut epithelium.
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