Question

what can be described as a technology that uses high - frequency sound waves to create images?
o ultrasound
o echolocation
o analog signal
o digital signal

Explanation:

Ultrasound is a technology that uses high - frequency sound waves (ultrasound waves). These waves are emitted, and when they encounter different tissues in the body (or other objects), they are reflected back. The reflected waves are then processed to create images. Echolocation is mainly a natural ability (like in bats) to detect objects using sound echoes. An analog signal is a continuous signal (not related to creating images with high - frequency sound in this context). A digital signal is a discrete signal (also not relevant here).

Answer:

ultrasound