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.
Many theories of syntax and grammar illustrate sentence structure using phrase 'trees', which provide schematics of how the words in a sentence are grouped and relate to each other. Trees show the words, phrases, and, at times, clauses that make up sentences.