Although an infant's color vision is not as sensitive as an adult's, it is generally believed that babies have good color vision by five months of age. Most babies start crawling at about 8 months old, which helps further develop eye-hand-foot-body coordination.
A language tree, or family tree with languages substituted for real family members, has the form of a node-link diagram of a logical tree structure. Such a diagram contains branch points, or nodes, from which the daughter languages descend by different links.
Because of the simple development of the English language. Same reason a tree is called a tree, or a man called a man. There is no specific reason. Maybe because it resembles â¦ a yam that grows in Haiti called a katato or something like that..