Refer to the input text as context and select the correct relationship between 'toy industry' and 'toy' from the available options.
Options: operator, parent organization, product/material produced, employer

While the toy industry is fickle and the hot toy of today is the forgotten toy of tomorrow, Mattel has a portfolio of brands that have been around for decades, including Barbie, Hot Wheels, and Fisher-Price.
product/material produced