What is alive that doesn't eat food?

Many living organisms do not consume food in the traditional sense, such as plants, which use photosynthesis to convert sunlight into energy. Additionally, certain bacteria and archaea can obtain energy through chemosynthesis, utilizing inorganic compounds instead of food. Furthermore, some fungi absorb nutrients directly from their environment without actively "eating." These examples demonstrate that life can exist and thrive through various energy acquisition methods beyond conventional eating.