1)
What is the meaning of "me'Ir Mesom"?
1.
Rashi: Hismo (they finished off) all city residents, and also the animals. Men and women are included; Mesom is extermination.
2)
What does "Kol ha'Nimtza" include?
1.
Radak: Also birds and Chayos - whatever they found, they killed.
3)
What are "he'Arim ha'Nimtza'os"?
1.
Radak: They are the cities that were not destroyed when Yisrael entered to kill the people. Those not destroyed in the war, they burned them.