The following systems help the body get oxygen and remove carbon dioxide waste. Apply what you learned about the heart to order these systems from the simplest to the most complex.

Ithink option a is correct because you cannot donate a different blood group than yours because it won't match.option a says betsy can donate to mark. they have the same blood group so donation can happen.

What do you mean about innate behavior i don’t get it

Ithink its c hope it : )

Of the cold they can survive in the cold