- A Herbivores that consume plants
- B Carnivores that prey on consumers
- C Plants and algae (photosynthesizers)
- D Decomposers breaking down matter
Correct answer: C. Plants and algae (photosynthesizers)
Explanation: Primary producers (autotrophs) like plants and algae produce organic matter from sunlight via photosynthesis, forming the base of food chains.
Concept context
Ecosystems, food chains, energy flow, nutrient cycles, biodiversity, and conservation.