Take context from the input text and decide on the accurate relationship between 'Norsk Hydro' and 'aluminium' from the options provided.
Options: product/material produced, chairperson, publisher, operator

Norwegian aluminium company Norsk Hydro ASA`s fully owned subsidiary, Hydro Aluminium Rolled Products GmbH , has secured a power contract with Axpo Trading AG, a Switzerland-based energy company with captive power production and international trading activity, totaling 0,9 TWh (100 MW) annually in the eight year period from 2018 to 2025.
product/material produced