Alkanes are ______ hydrocarbons. (saturated, unsaturated)

Explanation

**Step-by-Step Solution:**

1. **Understanding Hydrocarbons:**
- Hydrocarbons are organic compounds made up of hydrogen and carbon atoms.

2. **Types of Hydrocarbons:**
- Hydrocarbons can be classified into two main categories: saturated and unsaturated.
- **Saturated Hydrocarbons:** These contain only single bonds between carbon atoms. They are fully "saturated" with hydrogen atoms.
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