The answer is letter D.
Specificity
is a principle in training that generally requires a person to shift types of
exercises in a workout that would be relevant to the fitness goal of an
individual. The training should be aimed in developing specific areas that a
person wants to improve on. If for example you want to improve cardiovascular
endurance, you should be involved in aerobic activities like running. If you
want to build muscles and get good toning, the specific exercise should be weight
training.
It is an
important principle in exercise that should always be taken into consideration
to attain fitness goals.
