Take context from the input text and decide on the accurate relationship between 'Berkshire Hathaway' and 'insurance' from the options provided.
Options: director/manager, product/material produced, industry, subsidiary

Aug 7 (Reuters) - Warren Buffett's Berkshire Hathaway Inc said on Friday second-quarter profit fell 37 percent, reflecting a significant decline in investment gains and weaker results in its insurance operations.
industry