Which person is displaying altruism which is a behavior Auguste Comte claimed was the cornerstone of a better society?

You did not show us the image of the burger, but i shall try to answer as best i can.  when purchasing food, always consider the ingredients as well as the person who prepared it. consider if they were hygienic people or not, in case the burger was infected with bacteria. no mortal should place an infected burger into their mouth.   

Answerhomones;

The answer is "false". improved balance is not a primary benefit  of regular cardiovascular exercise.