1099-B what type of investment is a commodity?

I'm reviewing info imported from my 1099-B and I had sold shares of iShares Gold Trust in 2024. This is not a stock, bond, ETF, mutual fund, cryptocurrency, or options, as far as I know. Its own website lists its asset class as "commodity" and explicitly says: "The iShares Gold Trust is not an investment company registered under the Investment Company Act of 1940, and therefore is not subject to the same regulatory requirements as mutual funds or ETFs registered under the Investment Company Act of 1940. The Trust is not a commodity pool for purposes of the Commodity Exchange Act."

So what type of investment do I need to enter for the first sales info box?