A girl wearing a scarf is brushing a horse.
A girl is brushing a horse after coming back from a ride in the snow.
The girl brushing her horse may not have come back from a ride in the snow.
Just because a girl wearing a scarf is brushing a horse, doesn't mean the girl is brushing a horse after coming back from a ride in the snow.
A girl brushing a horse does not imply that she is coming back from a ride in the snow.