Final answer:
The correct answer is option C. Option C, trading your bicycle for an iPhone, represents a direct exchange because it is a barter of goods without the use of money, which is the definition of a direct exchange.
Step-by-step explanation:
The question being asked is which of the following is a direct exchange. A direct exchange is an economic transaction involving the trade of goods or services without the use of money or currency. In the list provided, the option that represents a direct exchange is:
- C. trading your bicycle for an iPhone
This is an example of bartering, where goods or services are exchanged directly for other goods or services without the use of money. The other options involve purchasing items with money, bidding with the intention to pay with money, or involve a third-party intermediary (e.g., eBay, flower delivery service), and therefore do not constitute direct exchanges.