Refer to the input text as context and select the correct relationship between 'Fonterra' and 'milk' from the available options.
Options: owned by, manufacturer, product/material produced, operator

Critics have claimed toxins from landfarms could have an effect on the milk produced by cows that graze the land, and Fonterra announced in 2013 it was to stop picking up milk from any new landfarms in Taranaki.
product/material produced