Microelectromechanical systems (MEMS) are small devices that combine mechanical and electrical components. They are made using electronic manufacturing technology, which allows for miniaturization and low-cost production. MEMS can be found in everyday items like cars, smartphones, and medical equipment. They range in size from 1 to 100 micrometers. There is also a new generation of even smaller components called NEMS, which are measured in nanometers. MEMS devices can be simple or complex, and they have two main functions: sensors and actuators. Sensors can detect things like temperature, pressure, and radiation, while actuators control the flow of gas and liquid. MEMS are used in a wide range of products, from video games to surgical equipment. They are also becoming more common in drones, robots, and personalized applications. In the future, they will play a big role in the Internet of Things (IoT).

Question: What are the two main functions of MEMS devices? A) Sensors and actuators B) Levers and springs C) Resistors and capacitors D) Nanometers and micrometers