Why does the Torah insert the words "be'Kerev Artz'cha'?
Ramban: Bearing in mind that "Efes ki Lo Yih'yeh b'cha Evyon refers to Eretz Yisrael exclusively, 1 the Torah here is referring to wherever one lives, even in Chutz la'Aretz, as does "be'Artz'cha" at the end of the Pasuk. 2
Bearing in mind what the Torah wrote in Pasuk 4 ("Efes ki Lo Yih'yeh b'cha Evyon"), what are the implications of "Ki Lo Yechdal Evyon ... "?
Rashi, Ramban and Targum Yonasan: Refer to 15:4:1:1.
Why does the Torah insert the word "Leimor"?
Rashi: It is offering a sound piece of advice. 1
Why does the Torah insert the word "le'Achicha"?
Ramban #1: Because the Din of Tzedakah only applies to giving to a fellow Yisrael, but not to a Nochri.
Ramban #2 (citing the Sifri): The Torah mentions both "Achicha" and "Evyonei Artzecha" to give precedence to one's relatives over strangers.
Ibn Ezra: Refer to 15:11:5:1.
Why does the Torah insert the word "Aniyecha"?
Ibn Ezra: The Torah is presenting the order of precedence in which to give Tzedakah: 1. "Achicha" - a close relative; 2. "Aniyecha" - other members of your family; 3. "Evyonei Artz'cha" - the poor of your country; 4. the poor of other countries.