I think it’s b bc a and c both say count ur heart beat for one minute
Answer is Changes not adaptions
The femur is not part of the circulatory system because it is a bone.
I have had it very many times. You dont want it. I have spend over half my life in the hospital becasue of it and other diesese that I don't want to bring up (it takes to long to explain).
D because if you are trying to reduce the carbon footprint then using less coal or oil based energy would be best. plus using the solar panels will help because all you have to rely on is the sun and your own power bank for energy. there for leaving less of a carbon footprint.
