Which three groups of organisms are the only ones capable of performing photosynthesis?

1. Plants, algae and a group of bacteria called cyanobacteria are the only organisms capable of photosynthesis. 2. Because they use light to manufacture their own food, they are called photoautotrophs. 3. Animals, fungi and most other bacteria are heterotrophs and must rely on sugars made by others. 4. Any option listing fungi or animals therefore mixes a heterotroph into the list. _Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 8 "Photosynthesis", section 8.1 Overview of Photosynthesis_