Answer:i think its the last one
Explanation:For their city to endure, the Inca had to find a way to keep it from sliding down the mountain. Perhaps the most visually striking features of the drainage system are the agricultural terraces. Machu Picchu includes 4.9 ha of agricultural terraces, which are held in place by stone retaining walls.
To be honest I think answer is two
Angkor Wat is a temple complex built in the Khmer Empire and is the largest religious monument in the world. It was built in the early 12th century and was first a Hindu temple and then a Buddhist temple. It was the capital of the Khmer Empire when King Suvayarman II ruled and made it his state temple and then eventually became his mausoleum. It is Cambodia's most visited site.
1) Russia, 2) China, 3) North Korea, etc.
