Natural extintion is also called

Options

A. Extinction vortex
B. Back ground extinction
C. K-T Boundary
D. All of there

Explanation

**Step-by-Step Solution:**

1. **Understanding Natural Extinction**: Natural extinction refers to the process through which a species gradually declines in number and eventually disappears from the ecosystem. This decline is not sudden; rather, it occurs over a long period.

2. **Characteristics of Natural Extinction**: It is characterized by a slow and steady decline of species, often linked to their evolutionary period on Earth. This means that as species evolve, some may not adapt well to changing environments or may face other challenges, leading to their extinction.

3. **Terminology**: Natural extinction is often referred to by another term. In this case, it is known as "background extinction." This term emphasizes that the extinction occurs as a part of the normal evolutionary process, rather than due to catastrophic events.

4. **Conclusion**: Therefore, the answer to the question "Natural extinction is also called" is "Background Extinction."

**Final Answer**: Natural extinction is also called Background Extinction.

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