Category Vedas

The Vedic texts (elaborated later in the Matsya and Markandeya Puranas, but rooted in Vedic cosmology) explain that offerings are not delivered as physical food. Instead, the ritual converts the offering into a subtle energy format appropriate for whatever realm the soul currently inhabits.
The Cosmic Translators: The Vedas describe a class of deities—primarily Agni (Fire), Soma (the cooling, nourishing principle), and Yama (the cosmic governor of transit)—who act as custodians.
The Conversion Process: If an ancestor has reincarnated as a deva (celestial being), the offering reaches them as amrita (nectar). If they are in a human realm, it reaches them as sustenance and favorable circumstances. If they are in an animal realm, it manifests as grass or feed.
The Calling Card: The ancestral energy is identified and tracked through the recitation of the family lineage (Gotram and Pravaram) paired with the precise names of the departed.
2. The Separation of Powers: Svaha vs. Svadha
The Vedas maintain a strict linguistic and spatial boundary between rituals meant for cosmic forces (Devas) and those meant for ancestors (Pitrus). This prevents the mixing of distinct energetic frequencies.