Explanation:
Vaccines- helped prevent soldiers from war getting various diseases.
Wearable sensors- For those with diabetes or heart diseases. It can help with control and monitor their conditions with more accuracy.
Magnetic Resonance Imaging (MRI)- It steers minuscule robots to deliver drugs or act as interventional tools within the human body.
Answer:
Convection currents describe the rising, spread, and sinking of gas, liquid, or molten material caused by the application of heat. Tremendous heat and pressure within the earth cause the hot magma to flow in convection currents.
The answers is B, because as you see in the passage it explains various situations about a broad topic and the answer b is the most logical way to answer the question.