Find out how energy flows up a food chain. Life processes - Living things in their environments - Food chains Learning Points All consumers ultimately rely on producers for energy. A food chain consists of organisms that rely on each for food. A food chain contains producers and consumers. A Twig Curriculum Film. Delivering key learning points. Get straight to the facts in just three minutes – directly linked to core learning, Twig's curriculum films will fit neatly into your lesson plans.