Final answer:
Vocabulary should be taught through planned lessons and natural conversations for English language learners.
Step-by-step explanation:
Vocabulary should be taught through planned lessons, at home, through natural conversations and interactions, or through both conversations and lessons. This applies to English language learners as well. Planned lessons in school can help students learn new words in a structured way, while conversations and interactions at home and in everyday life provide opportunities for practical application and reinforcement of vocabulary. For English language learners, a combination of both formal instruction and immersion in natural language environments is beneficial for language acquisition.