Which of these changes in today's world is a product of advances in biology?
a.increased crop yields
b.invention of lap tops
c.increased use of plastics

In my mind it is C, because A looks a bit too suspicious too me, because we already had a lot of crops, but now al lot of the things we use are plastic, such as plastic cups, chairs, and tables etc.
My final answer is C.increased use of plastics.

Hope this helps!

the answer is b.4NH3+5O2=4NO+H2O