Take context from the input text and decide on the accurate relationship between 'flying' and 'aviation' from the options provided.
Options: distributed by, employer, industry, subsidiary

So there's really not that much dependence on long-haul air travel for example, probably not that much difference on regional air travel; obviously, China's got a big aviation business and those planes are back flying and they're back flying at bigger numbers than they are in the US.
industry