Answer: "Uruguay's greatest natural resource is its fertile land, which is used for agriculture and livestock production."
Explanation: Here we need to complete the sentence:
"Uruguay's greatest natural resource is its ______, which is used for agriculture and livestock production."
And the options are:
corn crops
fertile land
sugar cane
reservoir
The thing that prevails in Uruguay is fertile lands, wich are almost the 23% of the total land of the country.