Question

in what way has technology used aboard the international space station benefited humans back on earth?
robotic arms used aboard the iss are now used in delicate surgeries on earth.
air purifiers developed for the iss now provide cleaner air for humans on earth.
software created for the iss was adapted and is now used to conduct brain surgery on earth.
research conducted on the iss crew about heart disease is now used to help patients on earth.

Explanation:

Robotic arms developed for the International Space Station (ISS) have been adapted for use in delicate surgeries on Earth due to their precision - like capabilities. Air purifiers for the ISS are for air - quality control in space and not directly related to cleaner air on Earth in the way described. Software for the ISS is not used for brain surgery. Research on ISS crew about heart disease is research data, not a technology.

Answer:

Robotic arms used aboard the ISS are now used in delicate surgeries on Earth.