<span>Stress can lead to many dangerous diseases and puts unnecessary pressures o your body</span>
The answer is D
Explanation:
I apologise for the late answer, but D would be the best one, as it does not discuss morality or anything differing from person to person. The effect it has on birds however, can be readily studied using the scientific method.
When DNA and proteins are condensed together they form chromosomes, which are located in the nucleus of a cell.