(Reuters) - Warren Buffett's Berkshire Hathaway Inc (BRKa.N) (BRKb.N) said on Friday its second-quarter profit fell 37 percent, reflecting a significant decline in investment gains and an underwriting loss from insurance operations, which include Geico.
Refer to the input text as context and select the correct relationship between 'Berkshire Hathaway' and 'insurance' from the available options.
Options: developer, industry, distribution format, director/manager