The Ministry of Commerce in Iran is like a big team of grown-ups who help decide how things are bought and sold in the country.
Imagine you have a toy store and you want to sell toys to your friends. The Ministry of Commerce helps make sure that your toy store follows certain rules and regulations, like not selling toys that could hurt someone or not charging too much money for them.
They also work with other countries to trade things back and forth, like buying cars from another country in exchange for oil from Iran.
Overall, the Ministry of Commerce is like a group of helpful grown-ups who make sure things are fair and safe when people buy and sell things in Iran.