Which describes the purpose of Power Saver mode for a portable computer?

Locking the computer when idle is a security feature, often configured through screen saver or power settings, but it is not the primary purpose of Power Saver mode which focuses on energy conservation.

Preventing unauthorized programs from consuming resources is a function of security software and operating system permissions, not the purpose of a power saving mode.

Protecting the display from burned-in images is typically handled by screen savers or display power-off settings, which can be part of a power plan, but it is not the overall purpose of Power Saver mode.

Power Saver mode is specifically configured to reduce the power draw of a portable computer by implementing various strategies like dimming the display, decreasing CPU speed, and powering down unused hardware components (e.g., hard drives, network adapters) when idle. This directly conserves the battery charge, making it last longer.