Metazoa, also known as the animal kingdom, encompasses a diverse group of multicellular organisms that are primarily characterized by their ability to move, consume organic material, and respond to their environment. This group includes a wide variety of species, ranging from simple organisms like sponges to complex ones like humans. Metazoans are classified into different phyla based on their body structure, reproductive methods, and developmental processes. Members of Metazoa are typically heterotrophic, meaning they obtain energy by consuming other organisms. They exhibit various forms of symmetry, such as bilateral and radial symmetry, and possess specialized cells and tissues. Metazoans reproduce both sexually and asexually, contributing to their vast diversity and adaptability in different ecosystems.