AP BIOLOGY

Detailed explanation-1: -Every food chain starts with producers because only plants are capable of changing light energy into chemical energy, which is then used by both plants and other consumers.

Detailed explanation-2: -A food chain always starts with a producer, which is an organism that makes food. This is usually a green plant, because plants can make their own food by photosynthesis.

Detailed explanation-3: -Producers, also known as autotrophs, make their own food. They make up the first level of every food chain. Autotrophs are usually plants or one-celled organisms. Nearly all autotrophs use a process called photosynthesis to create “food” (a nutrient called glucose) from sunlight, carbon dioxide, and water.

Detailed explanation-4: -Complete answer: A food chain always begins with plant life and ends with an animal. Plants are called producers because they’re able to use light energy from the Sun to supply food (sugar) from carbon dioxide and water. The process by which plants make food is called photosynthesis.