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Welcome to eGyanKosh’s Unit-4: Classification of Multicellular Animals-I, an essential resource for IGNOU students in 2025. This comprehensive study material offers an in-depth exploration of the classification systems that define the diverse world of multicellular animals. Designed to enhance your understanding of animal taxonomy, this unit covers key concepts, characteristic features, and the significance of classification in biological sciences. Whether you are a student preparing for exams or a curious learner seeking knowledge, our free downloadable materials provide a valuable opportunity to delve into the fascinating realm of multicellular life. Unlock your potential and enhance your learning journey with eGyanKosh!