In this task, you are given a text which is the body of a document. You are given a question and options. Pick the correct number. Don't generate anything else apart from the numbers provided in options.
Q: Context: Ile Alatau (Kazakh: Ile Alatauy) (Russian: Zailiysky Alatau) also spelt as Trans-Ili Alatau etc. is a part of the Northern Tian Shan mountain system (ancient Mount Imeon) in Kazakhstan and Kyrgyzstan. It is the northernmost mountain range of Tian Shan stretching for about 350 km with maximal elevation of 4973m (Talgar Peak). The term Alatau refers to a kind of mountains.
Question: The document can be classified to which topic?
Options: 1)Plant, 2)Animal, 3)Village, 4)NaturalPlace
A:
4