the answer is a. skin color
All of those ARE reasons why communicable diseases kill fewer people today except for B. Your answer is B.
Developmental assets increase the likelihood that a person will not engage in risky behaviors because they learn what to do and what not to do
The answer is : increased resistance need to be added to the muscles.
Muscle conditioning refer to muscle strength and endurance. In order to improve it, you need to put your muscle in a harsher condition in a harsher condition than it used to be, so your muscle could adjust to it. That's why you should keep increasing the resistance
