The waves generated by earthquake tremors are called :

Options

A. ultrasonic waves
B. rhythmic waves
C. systemic waves
D. seismic waves

Answer

**Step-by-Step Solution:**

1. **Understanding Earthquake Tremors**: When an earthquake occurs, it generates vibrations that travel through the Earth. These vibrations are what we refer to as waves.

2. **Identifying the Types of Waves**: There are different types of waves that can be generated in various contexts, such as ultrasonic waves (high-frequency sound waves), rhythmic waves (which can refer to waves that repeat in a regular pattern), and systemic waves (which is not a standard term in this context).

3. **Focusing on Earthquake Waves**: The specific waves generated by the movement of tectonic plates during an earthquake are unique to seismic activity.

4. **Conclusion**: The correct term for the waves generated by earthquake tremors is "seismic waves." Therefore, the correct answer is option 4.

**Final Answer**: The waves generated by earthquake tremors are called seismic waves.

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