What constitutes a Beged that requires Haza'ah?
Shabbos, 64a: We learn via a Gezeirah Shavah "Beged ve'Or" from Tum'as Sheretz in Shemini, Vayikra, 11:32, that it must be spun and woven 1 in order to be subject to Tum'as Meis.
See Torah Temimah, note 21.
What is the word "ve'Chol Ma'aseh Izim" coming to include?
Rashi and Targum Yonasan: It incorporates vessels manufactured from the horns, the hoofs and the bones of a goat in the Din of Haza'ah (which we learn from "ve'Chol Ma'aseh", and the Torah writes "Ma'aseh Izim" to preclude birds from the realm of Tum'as Meis - Chulin, 25b). 1
And not 'Ma'aseh Beheimah' or 'Chayah'. See Torah Temimah, note 22.