The indented key provides a sequence of choices between two or more characteristics.

Explanation

### Step-by-Step Solution:

1. **Understanding the Indented Key**: The Indented Key, also known as the Yoked Key, is a tool used in biological classification. It helps in identifying organisms based on a series of choices between characteristics.

2. **Characteristics of the Indented Key**: The key provides a sequence of choices that are structured in a way that allows users to narrow down their options based on observable traits. Each choice leads to further choices until the organism is identified.

3. **Couplets in the Indented Key**: The choices in the Indented Key are often presented in pairs called couplets. Each couplet offers two contrasting characteristics, guiding the user to the next step in the identification process.

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