Which has not actually been seen by astronomers? A. Kuiper belt
B. Main asteroid belt
C. Oort cloud

What does the word submerged mean in the following sentence? after it rained for three days in a row, the streets were completely submerged.

Drag and drop a statement or reason to each box to complete the proof. statement reason △abc , de⎯⎯⎯⎯⎯∥ac⎯⎯⎯⎯⎯ given corresponding angles postulate △bde∼△bac babd=bcbe polygon similarity postulate ba=bd+dabc=be+ec bd+dabd=be+ecbe substitution property of equality bdbd+dabd=bebe+ecbe addition of fractions 1+dabd=1+ecbe simplify. dabd=ecbe subtraction property of equality

In the late 1990s, brazil’s poor people protested about crowded cities land distribution mining permits industrial pollution