If this is for a class, this might not be the answer you’re looking for.
America has always been against immigration. Even as it was being built on the backs of immigrants from Europe, the colonists who were already here despised them. Xenophobia has been a part of American culture since it was founded. This long history with anti-immigration and nationalism coupled with white supremacy makes many Americans wary toward immigrants today.
Salinity is the measure of saline or the amount of dissolved salt there is in a body of water. Having a tolerance to salinity is helpful and more useful to the animal in the marine biome because there is more salt present than in a freshwater biome.
Germany's Citizen Participation. Citizens have same basic freedoms like those in the United Kingdom. All citizens are treated equally and have the right to vote