What is a firmware update?

A firmware update specifically refers to the process of updating the software that is embedded in hardware devices. Firmware acts as the intermediary layer between the hardware and software of a device, enabling it to perform its functions. Manufacturers often release firmware updates to fix bugs, improve performance, add new features, or enhance security. This process is crucial because it ensures that devices operate efficiently and remain compatible with other technologies and systems over time.

In contrast, while other options refer to important aspects of technology, they don't accurately describe what a firmware update entails. For example, upgrading hardware components or enhancing physical design focuses on the tangible parts of a device rather than the software that governs its operation. Similarly, techniques to increase battery life typically involve software optimization or hardware design strategies, rather than the specific action of updating firmware. Thus, the second option precisely captures the essence of what a firmware update is all about.