The answer is A because it is an example of red shift which if basically the Doppler effect , but for light. The wavelength gets longer because it has visible light has shifted into the red end of the spectrum, showing that it has a shorter frequency with a longer wavelength; meaning it is moving away from us
Marble. This is because granite is of a different chemistry that is not nearly as vulnerable to acidic rain as marble.
Answer:
Electric current can be generated by moving a metal wire through a magnetic field.