The answer should be "The diagonals of the parallelogram are congruent"
BTW you labeled your question as geography.... it's geometry so it should be under math...
There's multiple ways as to how the awareness can be raised about the influx of refugees, some of them are:
- Telling the truth about the migration, its effects (positive and negative), the real numbers of them, how are they acting in the society...
- Open public debates where all problems will be openly discussed on the table and there will be no hiding and covering of facts just for the sake of multiculturalism or to not be called a racist or nazi.
- Objective reporting by the media, instead of sticking to a certain point of view and only pointing out certain things while covering other ones that are usually very important and disturbing ones.
Increasing wavelength is an indication of a Doppler shift caused by an object moving away from the viewer. Longer wavelengths (of the visible spectrum) are redder, shorter wavelengths are bluer. Objects moving away from you have a red shift, objects moving toward you have a blue shift.
