Jean
If you use the tick boxes then you are saying that you can reliably walk that distance on the majority of days.
It's OK not to use any of the tick boxes on the form but you must still answer the question being asked, so if you do not tick any of the boxes for Moving Around then you must still explain the distance that you can reliably walk on the majority of days.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems