Take context from the input text and decide on the accurate relationship between 'Glencore' and 'mining' from the options provided.
Options: subsidiary, industry, business division, founded by

Glencore (Xetra: A1JAGV - news ) and Anglo American (LSE: AAL.L - news ) were the top fallers after Investec (LSE: INVP.L - news ) said the challenging environment for the sector calls into question the equity value of the mining companies.
industry