Final answer:
The question appears to be about the places of importance within a concentration camp's exchange market. The significance may vary, with places like the kitchen or infirmary being potentially more important than the crematorium, but the question requires more context for a precise answer.
Step-by-step explanation:
The question seems to be referring to the context of a concentration camp during World War II. In the context of the exchange market within a concentration camp, the crematorium would not generally be considered of primary importance. Instead, places like the kitchen might be of higher importance due to the distribution and exchange of food, which was a vital commodity for prisoners' survival.
The KaBe (infirmary) could also be considered significant as it relates to the health and medical treatment of the prisoners. The Buna, on the other hand, could refer to a work site or subcamp, like the Buna Werke factory at Auschwitz, which was significant in the context of labor and survival in the camps.
However, the question lacks contextual clarity, so the answer can vary depending on the specific historical perspective being taken. For a definitive answer, more background information is required to contextualize 'exchange market' in the right historical setting.