Question

Which is an example of biotechnology?

Researchers design a prosthetic foot.
A doctor uses a tiny robot to observe the interior of an artery.
The genes of a crop are manipulated to be insect resistant.
Engineers design a more efficient way to purify oil.

Answer 1

I would say that the correct answer would probably be The genes of a crop are manipulated to be insect resistant.

Step-by-step explanation:

Crop gene manipulation produces GMOs, which are a form of Biotech.

Biofuel development is the other one it might (probably won't) be, as Biofuel is an example of biotech too. However, I don't think making the purifying process more efficient is considered an example of biotech.

Good luck! :)