Here are some pictures for you that I think shows the juxtaposition. A comparison creates the contrast that is prompted by the title and I hope they justify the theme.
In the air or on the ground
Night and Day
Highs and Lows
Old and New
Dark and Light
Sun and Shade
Barren or Green
Real or Reflection
Alone or Together
Tall or Short , Stripes or Spots, Black-White or Color
Linking to ABC Wednesday - Round fifteen. Checkout the link to look for some amazing takes on the alphabet prompt from around the world.