1)
Why did Hashem expel Adam from Gan Eden?
1.
Oznayim la'Torah (in 2:17): Because He no longer trusted him not to eat from the Eitz ha'Chayim.
2.
Because everything in Gan Eden was available without having to work, and Adam was now obligated to work for a living.
2)
What are the connotations of "La'avod es ha'Adamah asher Lukach mi'Sham"?
1.
Targum Yonasan: It means that Hashem expelled Adam to Har ha'Moriyah, where he had been created, to work the land from which he had been created.
2.
Seforno: It means that Adam was sent to the location where he had been created, because the location and the air there would be the best suited for him.
