FOOD TECHNOLOGY

Detailed explanation-1: -Plants make their own food through a process called photosynthesis. Using the energy from the sun, water and carbon dioxide from the atmosphere and nutrients, they chemically make their own food. Since they make or produce their own food they are called producers.

Detailed explanation-2: -Producers make up the first trophic level. Producers, also known as autotrophs, make their own food and do not depend on any other organism for nutrition. Most autotrophs use a process called photosynthesis to create food (a nutrient called glucose) from sunlight, carbon dioxide, and water.

Detailed explanation-3: -A food chain always start with producers (green plants or algae) because they can make their own food. The food chain ends with decomposers which release nutrients back into the soil.

Detailed explanation-4: -A food chain always starts with a producer because some organism has to be able to produce energy from its environment to get the chain started. Consumers cannot obtain this energy directly, so if there were no producers to take in environmental energy, consumers would have nothing to eat and would not exist.