Answer:
D.type
Step-by-step explanation:
FITT principle is a guideline for an effective exercise program depending on the main aim of the program. The F stands for frequency, I stands for intensity, the first T stands for time while the last T stands for type.
Frequency is a measure of how often the exercise is carried out, intensity is a measure of how rigorous the exercise is, time is a measure of the duration of the exercise while type refers to the different kinds of exercise that is carried in the program.
Swimming, walking, jumping, cycling, weight lifting, etc. are different types of types of exercise.
Hence, the choice of swimming instead of walking is an example of type as far as FITT principle is concerned.
The correct option is D.