CLEAN : Burqa-wearing gunmen attack Afghan police

What is the primary focus of the first section?

• The geography of waterfalls

• The history of waterfalls

• The beauty of waterfalls

• The concept of the world

Which section discusses the concept of the world?

• Both sections

• The second section

• The first section

• Neither section

Which natural feature is discussed in the second section?

• Waterfalls

• Deserts

• Mountains

• Rivers

What is a key characteristic of waterfalls mentioned in the video?

• They are man-made

• They are static

• They are dynamic

• They are rare

What is the duration of the section on waterfalls?

• 271 milliseconds

• 1371 milliseconds

• 1571 milliseconds

• 490 milliseconds