Which animals share a branch of the phylogenetic tree because they have to molt to grow?

Animals that share a branch of the phylogenetic tree due to the necessity of molting to grow include arthropods, such as insects, Spiders, and crustaceans, as well as some other invertebrates like nematodes. Molting, or ecdysis, is a process where these animals shed their exoskeleton or outer layer to accommodate growth. This evolutionary trait is significant for their development and survival, allowing them to transition to larger sizes.