are teaching a class on computer hardware to new IT technicians. You are discussing the component on an Advanced Technology eXtended (ATX) motherboard that supports communication between the central processing unit (CPU) and random access memory (RAM). Which component provides this functionality

The chipset of the motherboard.

Explanation:

The chipset that is on the motherboard handles all the data flow management of the system.  This includes all communications that will occur on the motherboard including communication between the CPU and the RAM.  

The chipsets themselves are designd by the companies that create the CPUs but are integrated on the motherboards created by third-party vendors.

Hope this helps.

Cheers.

the omega button is one of them.