What type of radar uses reflected energy from the target for tracking?

Active radar is the correct choice because it emits its own energy signals, which then reflect off a target and return to the radar system. This reflected energy is used to determine the position, speed, and other characteristics of the target. The essence of active radar lies in its ability to send out a signal, interact with the target, and analyze the returned signal for tracking information.

In contrast, passive radar does not emit its own signals; instead, it relies on detecting and analyzing signals that are reflected from other sources, such as commercial broadcasts. This method makes it more stealthy but does not directly track targets like active radar does. Phased array radar refers to a radar technique that uses multiple antennas to steer beams of energy electronically. While it may also be active, simply labeling it as phased array does not explicitly convey the mechanism of using reflected energy from targets for tracking. Pulsed radar is a term that describes the signal transmission method — it can be part of an active radar system but is not a standalone type describing the function of reflecting energy from targets for tracking.