“once when he sat down to chat, he told us that in the immigrant car ahead there was a family from ‘across the water’ whose destination was the same as ours.”

its probably fingerprint or personality

what is your question?

the economic activity signified in that scenario is a. production

in general, market production makes reference to the elaboration of a product or service which is destinated for economic purposes (to be sold) at money-price in a market. such product or service has to be principally tradable for money.

there is no money exchange involved in distribution, generalized reciprocity or balanced reciprocity.

why you for the free points then!