What does a mixed-market economy allow consumers to do?

They generally allow for supply and demand to determine prices in a free market fashion - not governments or artificial price levels. Due to its structure, mixed economies allow the economy to be driven by private self-interest and incentives.

following type of cultural development caused people to want and buy new products on the market :

hello,

the steamboat is your answer.

it seems like its the only form of transportation on the choices.