Sabatier-Senderen's reduction.

Explanation

### Step-by-Step Solution for Sabatier-Senderen's Reduction

**Step 1: Understanding the Reaction**
The Sabatier-Senderen reduction involves the hydrogenation of unsaturated hydrocarbons, specifically alkenes and alkynes, to form saturated hydrocarbons (alkanes).

**Step 2: Identifying the Reactants**
The general reaction can be represented as:
- For alkenes:
...