Define organic evolution in three words

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Organic Evolution**: Organic evolution refers to the process through which species of organisms change over time, leading to the development of new species from pre-existing forms. This process is driven by various factors, including genetic changes, environmental influences, and natural selection.

2. **Key Concepts**:
- **Descent**: This refers to the passing of traits from ancestors to their descendants. It emphasizes the lineage and continuity of life forms over generations.
- **Modification**: This indicates the changes that occur in the traits of organisms over time. These changes can be adaptations to the environment or alterations in physical or behavioral characteristics.

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