Final answer:
The correct answer is OB. está. 'Está' is the appropriate word to complete the sentence, indicating the location of 'El Salar de Uyuni.'
Step-by-step explanation:
The correct answer is OB. está.
'Está' is the appropriate word to complete the sentence. In Spanish, 'estar' is used to indicate the location of something. Since 'El Salar de Uyuni' is a location, 'está' is the correct form of the verb to use.
For example, you could say 'El Salar de Uyuni está ubicado en Bolivia.'
Learn more about Spanish verb conjugation