______________ depend on abiotic factors such as sunlight, humidity, and water. They use them as energy for optimal food synthesis.

The correct answer is: Both B and C

• Producers and photoautotrophs can produce their own food by taking light of sun and water
• Producers and photoautotrophs include plants and some microbes like certain protists, algae, etc
• These organisms contain an organelle called chloroplast that is responsible for absorbing sun light 
• The process by which food is prepared by these organisms is called as photosynthesis