Final answer:
HeatWave is an integrated query acceleration engine for the MySQL Database Service, greatly speeding up complex query processing for analytics purposes.
Step-by-step explanation:
The primary purpose of the MySQL database service HeatWave is b) Query acceleration. HeatWave is an integrated query acceleration engine that runs high-performance analytics directly on the MySQL Database Service. It helps in dramatically accelerating MySQL performance by offloading query processing to a highly optimized, parallel, in-memory query accelerator.
By doing so, complex database queries can be conducted faster compared to traditional MySQL services, making it an excellent option for real-time analytics.