What is the primary focus of biotechnology?

The primary focus of biotechnology is on the use of biological systems, organisms, or their derivatives to develop or create products and technologies. This field harnesses cellular and biomolecular processes to innovate in various sectors such as medicine, agriculture, and environmental management. By manipulating living organisms or their components, biotechnologists can produce drugs, genetically modified crops, and biofuels, among other applications.

In contrast, the other options address aspects that do not encapsulate the core essence of biotechnology. Creating synthetic chemicals focuses more on chemistry rather than biological processes, which is outside the main scope of biotechnology. Developing non-biological medical devices does not involve biological systems or living organisms, making it a separate field within medical technology. Lastly, improving agricultural soil quality through chemical fertilizers pertains to agricultural practices rather than the biotechnological innovations that involve living organisms or their derivatives.