1. The document discusses the development of children's speech production and comprehension from babbling to first words to telegraphic speech to rule formation. It explains that speech comprehension precedes production and the relationship between thought, comprehension, and production.
2. It describes characteristics of parentese/baby talk that aid language learning like exaggerated intonation and simplified grammar and vocabulary. Imitation, rule learning, and correction play roles in acquisition.
3. Memory and logic also facilitate language learning as children form word-object associations through memory and use inductive and deductive reasoning. Abstract words are learned later through experience and metaphor.