Why are my arborvitaes dying and how can I save them?

Arborvitaes may be dying due to various reasons such as pests, diseases, improper watering, or poor soil conditions. To save them, identify the specific issue causing the decline and take appropriate action. This may include pruning affected areas, improving drainage, providing proper nutrients, and applying pest control measures. Consulting a local gardening expert for guidance can also be helpful.