Its not dumb. Sweetie I don't even know
'Red shift' is a key concept for astronomers. The term can be understood literally - the wavelength of the light is stretched, so the light is seen as 'shifted' towards the red part of the spectrum.
Hope this helps.
I believe it would be B. More than a year (Since it is a slow change, and that is the longest amount of time). Hopefully this helps
Its the femur
located on the thigh