Answer:
[tex]\boxed {\boxed {\sf Eat \ other \ plants \ and \ animals}}[/tex]
Explanation:
Plants, algae, and certain bacteria can photosynthesize and make their own food by converting carbon dioxide, water, and sunlight to glucose and oxygen.
Animals cannot undergo this process and produce their own food, so they have to eat food to obtain glucose.
Animals get glucose and energy by consuming plants or other animals.