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.
The following trees are those of a dependency grammar : The subject is a dependent of the root node, the finite verb, in both trees. The object, in contrast, appears lower in the second tree, where it is a dependent of the non-finite verb.