A horizontally organized commodity chain describes:

a commodity chain where all steps of the commodity chain take place within a single imperial empire $($e$.$g$.$ the British Empire$)$

a commodity chain where another company is bought by a larger company so that they can move into near$-$ready storefronts in a new market

a commodity chain where no single company controls the entire commodity chain, but instead component parts are outsourced to or purchased from other companies

a commodity chain in which a single company controls the entire commodity chain from production through sale to consumers