A: Density
All the rest are chemical, not really sure exactly how to explain it. But I hope this helped!
I see half an angel’s body and her dress flowing. I see the clouds, train and sea with ships.
I think the angel is trying to save something.
I wonder what the angel is doing
I think that Hitler saw in Austria the chance to increase the number of loyal, German soldiers - Austrians speak German and are culturally similar so it was easy to include them into the German army and so quickly acquire a great number of loyal soldiers who spoke the language and shared the culture with the Germans.
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A) white supremacy. columbus was a racist so that makes sense