Which of the following is not a fire safety precaution? a. hold matches until they are cool. b. use only lighters to light fires. c. build fires or use camp stoves only in clear, flat, open areas. d. don't park your car in dry grass or brush.

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