Final answer:
The best method to develop children's oral language competence is by providing opportunities for conversation and storytelling, as this form of interactive engagement is most closely aligned with natural language learning processes.
Step-by-step explanation:
The best way to help children develop oral language competence is indeed multifaceted. However, among the options presented, providing opportunities for conversation and storytelling, which include direct speaking to the child, asking questions, and engaging in discussions about a variety of topics, is the most effective way to foster language development. It not only helps with vocabulary acquisition but also with understanding grammar, context, and the subtleties of language. Additionally, reading to them regularly can significantly expose them to new words and ideas, thereby increasing their language skills. Enrolling them in language classes and encouraging them to watch educational TV shows can be helpful, especially for older children, but are not necessarily the best methods for developing oral language skills in younger kids compared to interactive conversation and storytelling.