Which of the following is an example of biotechnology? a.) a petroleum based lubricant used in farming machinery b.) a driverless, solar powered automobile c.) a robotic probe on Mars that can detect water d.) a mechanical implant that delivers medicine

I think the correct answer from the choices listed above is option D. A mechanical implant that delivers medicine is an example of biotechnology. Biotechnology is the use of living systems and organisms to develop or make products, or "any technological application that uses biological systems.