The theory that living organisms on the earth came from outer space is based on the study of

Options

A. Igneous rocks
B. Sedimentary rocks
C. Meteorites
D. Moon soil

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the theory that suggests living organisms on Earth originated from outer space.

2. **Analyzing the Options**: The options provided are igneous rocks, sedimentary rocks, meteorites, and moon soils. We need to evaluate each option to determine which one supports the theory of extraterrestrial origin of life.

3. **Evaluating Igneous Rocks**: Igneous rocks are formed from the cooling and solidification of magma or lava. They are found on Earth and do not provide evidence for the origin of life from outer space. Thus, this option is incorrect.

4. **Evaluating Sedimentary Rocks**: Sedimentary rocks are formed from the accumulation of sediments and organic materials. Like igneous rocks, they are also formed on Earth and do not support the theory of extraterrestrial origins. Therefore, this option is also incorrect.

5. **Evaluating Meteorites**: Meteorites are remnants of asteroids or comets that have fallen to Earth from space. The panspermia theory suggests that life, or the precursors of life, could have been transported to Earth via meteorites. This theory supports the idea that living organisms may have originated from outer space. Hence, this option is correct.

6. **Evaluating Moon Soils**: Moon soils, or lunar regolith, are the surface materials found on the Moon. There is no evidence to suggest that moon soils contributed to the origin of life on Earth, making this option incorrect.

7. **Conclusion**: Based on the analysis, the correct answer to the question is **meteorites**.

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