This lecture explains how animals are classified into vertebrates (with a backbone, e.g., fish, frogs, lizards, pigeons, cats) and invertebrates (without a backbone, e.g., cockroaches, butterflies, starfish, millipedes). Plants are grouped into flowering (produce flowers and seeds, e.g., rose, mustard, apple) and non-flowering (no flowers, e.g., moss, ferns, conifers like pine and juniper). Conifers are common in northern Pakistan and provide wood, paper, and pine nuts. The concept of biodiversity is introduced as the variety of living things, important for a healthy environment but threatened by habitat destruction, climate change, and water scarcity. Examples include Pakistan’s billion tree project and Changa Manga forest. The lesson also covers life processes such as nutrition (plants make food through photosynthesis, animals eat plants or other animals), respiration (breathing to release energy), excretion (removing waste), movement, growth, reproduction, and response to environment. It compares plants and animals, showing differences in nutrition, movement, respiration, excretion, growth, reproduction, and sensitivity. Important terms discussed include organisms, photosynthesis, respiration, excretion, sensitivity, vertebrates, invertebrates, and biodiversity. The lecture uses examples, demonstrations, and activities to make learning interactive and easy to understand.