The main theme is friendship and imagination. It shows how the bond between the main characters helps them cope with life's challenges and how their imaginative world provides an escape and source of strength.
The novel 'A Bridge to Terabithia' mainly focuses on themes like the power of friendship, the importance of imagination, and coming to terms with loss. The friendship between the characters allows them to create a magical world in their minds and gives them the courage to face difficult situations. The element of loss is also significant as it teaches valuable lessons about grief and acceptance.