Concept:Sight words are high-frequency words that children learn to recognize instantly without decoding, through repeated exposure in meaningful contexts.
Explanation:Sight words like 'the', 'and', 'she' occur often in text.
They are not easily sounded out phonetically.
Children develop sight recognition when they hear, see, and use these words in real sentences and stories.
This meaningful context builds automatic recall, not just from textbook lists.
Option A (textbooks alone) is insufficient.
Option C (difficult word meanings) is about vocabulary, not sight words.
Option D (seeing them on sight) is circular and lacks the learning process.
Thus, the most effective method is using words in meaningful contexts.
Answer:B (by using words in meaningful contexts)