Does the deceased feel the piety of his son towards him if he sacrifices on his behalf, or gives charity, or supplicates for him, or visits his grave?

The texts of Islamic law indicate that the deceased benefits from the charity given on their behalf by the living, and from their supplication for them. Sacrificial offering (adha) on their behalf is a type of charity. If the one giving charity is sincere in their charity on behalf of the deceased and in their supplication for them, the deceased will benefit, and the one supplicating and giving charity will be rewarded. As for the deceased sensing who has done good to them, there is no legal evidence for this, and it is a matter of the unseen.