The correct answer is D. Ultrasonic waves.
Ultrasound is a form of sound that is too high in frequency for humans to hear. It is used in a variety of medical imaging procedures, including sonography. Sonography
uses ultrasonic waves to create images of the inside of the body. The waves are transmitted into the body and bounce off of tissues, organs, and other structures. The echoes are then collected and used to create an image on a computer screen.Ultrasound is a safe and painless procedure that can be used to diagnose a variety of medical conditions. It is often used to assess the health of a fetus during pregnancy. It can also be used to diagnose problems with the heart, lungs, kidneys, and other organs.
Microwaves are a form of electromagnetic radiation that has a wavelength of about 1 millimeter to 1 meter. They are used in a variety of applications, including cooking, radar, and telecommunications.
Infrared waves are a form of electromagnetic radiation that has
a wavelength of about 700 nanometers to 1 millimeter. They are used in a variety of applications, including remote sensing, night vision, and thermal imaging.Sound waves are a form of mechanical wave that is produced by the vibration of an object. They travel through a medium, such as air or water, and can be used to carry information.
The waves used in sonography are ultrasonic waves because they are able to penetrate the body and create images of the inside of the body.