Final answer:
A child's first words generally revolve around essential elements of their immediate world, such as important people, animals, vehicles, actionable objects, food, body parts, and greeting terms, evolving from single nouns to simple sentences as they grow.
Step-by-step explanation:
A child's first words mainly consist of concepts and objects essential to their immediate world and therefore could include important people, such as 'mama' or 'dada,' common animals they might frequently encounter or be fascinated with, like 'dog' or 'cat,' vehicles that they notice moving in their environment, such as 'car' or 'truck,' and also actionable words or objects they interact with like 'ball' or 'food'. During the initial stages of language development, children in the one-word stage often use single nouns that can represent an entire phrase or request. As they grow, they begin to grasp and use more complex forms of communication, combining words into sentences to better express their thoughts and needs. For example, between the ages of two and three, they transition into creating simple sentences and enhance their vocabulary significantly, which includes expanding to categories like body parts and greeting terms, while also learning to sing along to songs and asking questions.