1. interaction between atmosphere and biosphere.
An example of this interaction would be the way in which plants give out carbon dioxide and absorb oxygen from the air. Plants are able to do so directly from the air through their stomata.
2. interaction between atmosphere and geosphere.
The atmosphere provides the geosphere with the energy necessary for the breakdown of rocks and erosion. The geosphere reflects the energy of the sun back to the atmosphere.
3. interaction between hydrosphere and atmosphere.
The water cycle is a good example of this interaction, as well as the weather phenomena that come from it (rain, snow, etc.)
4. interaction between hydrosphere and geosphere.
An example of such an interaction would be the erosion that is caused by water in rivers and waterfalls.