How can you improve indoor air quality? a. keeping pets indoors as much as possible b. using darker paint on all interior walls c. installing sunscreens on all windows d. increasing ventilation in enclosed spaces select the best answer from the choices provided. a b c d

I would mabe think it's d

Bmust be the answer, as technically all organs move, so a is incorrect. all organs are made of different types of cells, so that isn’t a problem, so c is also incorrect. human hearts are very similar to many other animals’ hearts, so d is also incorrect, yet the heart is made of muscle, which is hard to grow in the lab so it would be correct to say b