This document provides information about a student teacher's lesson on food chains. It introduces the student teacher Saajan.S, supervising teacher Dr. Sharmila.S, school S.K.V H.S Nanniyode, subject of biology, topic of food chains, and unit of agriculture as a way of life. It then defines a food chain as a linear sequence in a food web starting with a producer species and ending with a decomposer, showing how organisms are related by what they eat. It further explains that a food chain demonstrates the transfer of food energy from one organism to another, typically starting with a producer like a plant, then to primary, secondary, and tertiary consumers.