Final answer:
Pinch zoom on an Android device is enabled by the multi-touch feature, which allows the screen to detect multiple touch points simultaneously.
Step-by-step explanation:
On an Android device, the capability to pinch zoom is provided by the C. Multi-touch feature. This technology allows the screen to recognize more than one touch point at the same time, which is essential for performing gestures like pinch zooming. The accelerometer is used to detect the orientation of the device, a micro USB port is for charging and data transfer, and a trackball is an alternative input method for navigating the interface.