The answer to 'difference between spider' is that spiders and insects are two distinct types of arthropods. Spiders are arachnids, while insects belong to a different class called Insecta. The key differences between spiders and insects include the number of legs, body segmentation, and method of respiration.
Spiders have 8 legs and 2 body segments (cephalothorax and abdomen), while insects have 6 legs and 3 body segments (head, thorax, and abdomen). Spiders also use book lungs to breathe, while insects have a tracheal system. Additionally, spiders spin webs to catch prey, while insects have a wide variety of feeding behaviors.