Recent hurricane events have caused erosion of coastal areas and resulted in an increase of waterfront for homes along the coast. this is an interaction between which two spheres?

Atmosphere/hydrosphere and geosphere

Explanation:

A hurricane forms via the interaction between the hydrosphere and atmosphere. Hurricanes form as surging storms over tropical waters where there is an interaction between warm tropical waters and winds. When the hurricane forms and hits coastal areas, erosion of the shorelines occurs. Erosion is the washing away of earth materials. The earth materials are components of the geosphere. The geosphere is the solid portion of the earth.

Therefore, the hurricane is produce via the interaction atmosphere and hydrosphere.  

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).