The answer is the first level.
Lifestyle activities are the first step of the physical activity pyramid.
The steps of the physical activity pyramid from bottom to top are:
1. moderate physical activity,
2. vigorous aerobics,
3. vigorous sport and aerobics,
4. muscle fitness exercises,
5. flexibility exercises.
Lifestyle activities are moderate physical activities that are performed daily. The examples for moderate physical activities are housework, yardwork, non-vigorous sports, etc.