The people in the first photo HAPPIER / THAN / SEEM / MUCH the people in the second photo
The people in the first photo SEEM MUCH HAPPIER THAN the people in the second photo
The people in the second photo are indoors, which ENJOYABLE / BEING / AS / ISN´T / AS in the fresh air.
The people in the second photo are indoors, which ISN´T AS ENJOYABLE AS BEING in the fresh air.
They GETTING / EXERCISE / PROBABLY / MORE / ARE /.
They ARE PROBABLY GETTING MORE EXERCISE