Which kingdom consists of multicellular organisms that use sunlight to make energy through photosynthesis?

• A. Plantae
• B. Fungi
• C. Animalia
• D. Protista

Answer: (A)

Plants perform photosynthesis, using sunlight to convert carbon dioxide and water into sugars, with chloroplasts containing chlorophyll as the site of this energy capture. Because they are multicellular and have tissues specialized for photosynthesis and nutrient transport, they belong to the plant kingdom. The other choices don’t fit as well: fungi are mostly heterotrophic decomposers; animals rely on consuming other organisms; protists include a mix of organisms, many unicellular, and while some protists are photosynthetic, this group is not defined by both multicellularity and photosynthesis like plants are. Therefore, Plantae.