Who formed the continuous variations as the basis of his theory of evolution?

Explanation

**Step-by-Step Solution:**

1. **Understanding Continuous Variation**: Continuous variations are small, gradual changes that occur within a species. These variations can be observed in various traits, such as height, skin color, or trunk length in elephants.

2. **Examples of Continuous Variation**: A common example of continuous variation is height in humans. Individuals can be classified as short, medium, or tall, demonstrating a range of heights rather than distinct categories.

3. **Role of Charles Darwin**: Charles Darwin is the scientist who recognized the significance of continuous variations in his theory of evolution. He observed that these variations occur naturally within species and can influence the process of evolution.

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