This type of stain separates bacteria into 2 groups based on their reaction, gram-positive or gram negative

People who utilizes the progression principle will ensure their exercise program increases in frequency, intensity, time, and type. the changes need to happen gradually in order to ensure they make gains in their fitness program. a person who doesn't utilize the progression principle can still gain health benefits from exercising, but will not continue to improve in cardiovascular fitness.

Death by starvation.

The answer to your question is  it relieves stress and boredom.  the rest of the answer choices would be long term.