Knowledge of United States history is to ___ as understanding algebra is to \( \begin{array}{l}\text { emotional intelligence; analytical } \\ \text { intelligence }\end{array} \) crystallized intelligence; fluid intelligence interpersonal intelligence; intrapersonal intelligence \( \begin{array}{l}\text { creative intelligence; practical } \\ \text { intelligence }\end{array} \)

To solve this analogy, we need to understand the relationship between the first pair of terms and then apply that same relationship to the second pair. 1. **Understanding the first pair:** - "Knowledge of United States history" is a type of **crystallized intelligence**. Crystallized intelligence refers to the ability to use learned knowledge and experience. It involves facts and information that one has accumulated over time. 2. **Understanding the second pair:** - "Understanding algebra" is more related to **fluid intelligence**. Fluid intelligence is the capacity to think logically and solve problems in novel situations, independent of acquired knowledge. It involves reasoning and the ability to analyze new problems. Now, we can fill in the blank in the analogy: - Knowledge of United States history is to **crystallized intelligence** as understanding algebra is to **fluid intelligence**. Thus, the correct answer is: **crystallized intelligence; fluid intelligence**.