Utilize the input text as a context reference, choose the right relationship between 'Glencore' and 'mining' from the options.
Options: industry, platform, parent organization, member of

Having transformed Glencore from a poorly understood commodities trader based in Baar into one of the world's largest resources companies through the spectacular $US60 billion float four years ago and the takeover of mining group Xstrata in 2013, the hard-nosed South African was lauded as a savvy deal maker.
industry