What formed the great rift valley?

1: volcanic activity and tectonic movement
2: a massive earthquake 200 years ago
3: a mountain range west of the valley
4: a massive basin in the valley's center

What was istanbul called before he ottomans conquered the city in the 15th century

The yellow river is also known as the huang he river? true or false

Paraguay is one of the only two countries in the americas that don't have a coastal border. the country is slightly smaller than california. it was under a military dictatorship for 35 years, ending in 1989; today it is a constitutional republic. most of the population is roman catholic, and over 60% of the people live in cities. its environment is threatened by deforestation and water pollution. which of the following facts from the paragraph above best describes an element of paraguay's culture? (apex)