Question

which observation tool allows shaunas doctor to monitor her blood circulation in real - time?
a microscope
a telescope
an x - ray
an ultrasound

Explanation:

A microscope is for small - scale objects like cells, a telescope is for distant celestial objects, and an X - ray shows bone structures and some dense tissues but not real - time blood circulation. Ultrasound uses sound waves to create real - time images of blood flow and internal organs.

Answer:

an ultrasound