Question

which of the following objects is installed between the back side of the system case and the motherboards ports?
heat - spreader
standoffs
i/o shield
fan
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Explanation:

In a computer system, a heat - spreader is often installed between the back side of the system case and the motherboard's CPU to help dissipate heat. Standoffs are used for mechanical support, an I/O shield is for the I/O ports, and a fan is usually for air circulation in the case but not typically installed in that specific location for heat - related purposes between the case back and motherboard CPU area.

Answer:

Heat spreader