Tell me something about electrical & electronics​

Electronics is a branch of science and technology that uses controlled electron transfer of different media. The ability to control the flow of electrons is usually used for information handling or device control. Electronics is different from electrical science and technology, which also deals with the production, distribution, control and use of electrical power.  

The main uses of electronic circuits are the control of systems, the processing and distribution of information, the generation and control of electromagnetic waves and pulses, and the conversion and distribution of electricity. All of these uses involve generating and detecting electromagnetic fields and electricity. Most electronic systems fall into two broad categories: control and automation systems and communications systems.

As the question is in the Spanish category, here it goes in that language:

La electrónica es una rama de la ciencia y la tecnología que utiliza la transferencia de electrones controlada a través de diferentes medios. La capacidad de controlar el flujo de electrones se usa generalmente para el manejo de información o el control de dispositivos. La electrónica es diferente de la ciencia y la tecnología eléctricas, que también se ocupan de la producción, distribución, control y uso de la energía eléctrica.

Los principales usos de los circuitos electrónicos son el control de sistemas, el procesamiento y distribución de información, la generación y control de ondas y pulsos electromagnéticos, y la conversión y distribución de electricidad. Todos estos usos implican generar y detectar campos electromagnéticos y electricidad. La mayoría de los sistemas electrónicos se dividen en dos categorías amplias: sistemas de control y automatización y sistemas de comunicaciones.

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the correct answer would be d, almost 2 million square feet.

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