A.
heredity, unhealthy behaviors, and the environment

I am unsure as to what the question is, however I will tell you those definitions. Heredity is something in your genes, unhealthy behaviors are things that don't benefit your health like smoking, and the environment can be affected by smoking. If this is not what you were looking for please let me know! ; )

The freezing point of the ice is lowered because of the rock salt which then allows the ice to observe heat from the ice cream mixture without it melting.

Dbecause it isn't always an athlete, breathing techniques don't have to be advanced, and consistent intensity won't make it go down or stay the same