Final answer:
Balanced reciprocity and market exchange are two significant parts of exchange in social dynamics, reflecting the expected mutual exchange among friends and the unencumbered transactions among strangers in capitalist societies, respectively.
Step-by-step explanation:
The two relative parts of exchange discussed in different contexts are balanced reciprocity and market exchange. Balanced reciprocity refers to the unspoken agreement where a favor is expected to be returned in the future, as is often the case among friends and acquaintances. For example, if you help a neighbor, it's anticipated that they may help you in a similar way later on. Market exchange, on the other hand, is prevalent among strangers in capitalist societies, where transactions are completed with payment, leaving the participants without future obligations towards each other. This type of exchange is efficient but is criticized for fostering self-interest over collective well-being. Therefore, these two forms of exchange demonstrate different social dynamics and the balancing act between efficiency and community ties in capitalist societies.