The country among the choices which has about 20 active volcanoes is the Philippines. The PHIVOLCS which is the Philippine national institution dedicated to studies on volcanoes have identified at least 23 volcanoes as active with 21 of them having historical eruptions.
It is in Asia .
Near Indian ocean.
The explanation for the differences in wavelength observed from earth and a distant star with a shift towards the red end of the spectrum is the Redshift- Doppler effect.
<h3>What is the Doppler effect?</h3>
The Doppler effect is the difference that occur between the frequency of a wave in relation to observer from the wave source.
The wavelength changes with change in the frequency.
<h3>How does the Doppler effect explain the redshift?</h3>
As an object moves away from Earth, the waves moves to the red end of the electromagnetic spectrum and becomes elongated. This results to the increase in wavelength.
Therefore, the explanation for the differences in wavelength observed from earth and a distant star with a shift towards the red end of the spectrum is the redshift-Doppler effect.
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A geological fault is the type of fault which is caused by a crack in the <em>surface of the Earth's crust</em> and has to do with tectonic plates which <em>shift and change positions.</em>
As a result of this, we can see that these geological faults has to do with shifts of the tectonic plates which have the ability to cause earthquakes which can cause destruction of the earth.
With this in mind, there are different kinds of faults and they include:
- Normal Fault
- Reverse Fault
- Divergent Fault
- Strike-slip Fault, etc
Please note that your question is incomplete so I gave you a general overview to help you better understand the concept.
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