Why is animalia the biggest kingdom?

Answer 1

Likely because it contains Phylum Arthropoda, which makes up more than 80% of all described living species. This is because Arthropoda is the phylum of insects, the most diverse group of life on the planet.

Answer 2

Animalia is the largest kingdom because it includes a wide variety of organisms with complex structures and functions. Animals exhibit diverse modes of reproduction, feeding, and behavior, leading to high species diversity and abundance compared to other kingdoms. Additionally, animals have evolved adaptations that allow them to inhabit diverse habitats worldwide.