According to the book of Numbers in the Bible, Moses sent twelve spies, one from each tribe of Israel, to explore the land of Canaan. Among them was a spy from the tribe of Reuben, but the name of that spy is not given directly in the Bible. However, the Bible does mention the names of the twelve spies in the book of Numbers, chapter 13, verses 4-15. Therefore, we can eliminate the options that are not listed in these verses.
The names of the twelve spies mentioned in these verses are Shammua, Shaphat, Caleb, Igal, Joshua, Palti, Gaddiel, Gaddi, Ammiel, Sethur, Nahbi, and Geuel. So, one of the spies Moses sent to the land of Canaan from the tribe of Reuben was either Shammua, Caleb, Igal, Palti, Gaddiel, or Gaddi.
However, in verse 4 of Numbers 13, the Bible specifies that the spy from the tribe of Reuben was named "Shammua, the son of Zaccur." Therefore, the correct answer to the question is Shammua.