What describes tier 1 words?

Tier 1 words are the most basic and commonly used words in everyday language. These are the words that children typically acquire first as they begin to speak and build their vocabulary through daily interactions. They include simple nouns, verbs, and adjectives that are familiar to most people, such as “dog,” “run,” and “happy.” Because these words are foundational, they form the building blocks for more complex language and are essential for effective communication in day-to-day life.

The other choices describe different types of vocabulary that are not categorized as Tier 1. Words with multiple meanings belong to a different complexity tier and require more extensive context or understanding. Technical words specific to content areas, such as "photosynthesis" or "preamble," are usually considered Tier 3 words and are more specialized. Complex vocabulary used in literature tends to involve more sophisticated language that often requires analysis and interpretation, typically categorized as Tier 2 or higher.