<span>The Civil Right Acts of 1866 was the United States federal law to define citizenship and to affirm that all citizens are equally protected by the law</span>
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first one ,I guess first one.
Answer: Redshift and blueshift describe how light shifts toward shorter or longer wavelengths as objects in space (such as stars or galaxies) move closer or farther away from us. When an object moves away from us, the light is shifted to the red end of the spectrum, as its wavelengths get longer. Hope this helps!