Is it permissible for a Muslim man in his eighties, who is free from illness and enjoys good health, not to fast Ramadan under the pretext of fearing that his body might not endure the fasting, and is it permissible to prepare food for him during the daytime in Ramadan while he is not fasting?

It is permissible for one who is unable to fast due to old age and the severe hardship of fasting to break their fast and feed a poor person for each day. If they are unable to feed, then there is nothing upon them. However, if fasting does not cause them extraordinary hardship, then it is not permissible for them to break their fast, nor is it permissible to assist them in doing so.