Final answer:
The number of words in a sentence a child uses typically increases with each month of age, as language skills develop in tandem with cognitive and psychosocial growth. This expansion becomes more pronounced around 2 to 3 years of age, when toddlers rapidly acquire new words and begin forming more complex sentences.
Step-by-step explanation:
As a child begins to develop language skills, the number of words in a sentence generally increases with each month of age. This development is part of a child's cognitive and psychosocial growth. Initially, children produce one-word utterances, which may express larger meanings despite their brevity. For instance, the word 'cookie' can signal identification or a request. By the age of 2, a toddler may use between 50 and 200 words and begins to construct simple sentences. As they reach the age of 3, the vocabulary expands remarkably to up to 1,000 words, allowing them to engage in more complex sentence formation.
Language acquisition during childhood is a rapid and sophisticated process deeply embedded in cognitive development. By 5 years old, a child has usually mastered a vocabulary of at least 1,500 words and can produce sentences with five to seven words. They engage with others through humor and recognize the purpose of objects and concepts such as calendars and money. The rate at which children acquire language can vary, with some children experiencing significant 'vocabulary spurts' while others develop at a steadier pace without distinct spurts.