The presence of a fluid-filled sac (amnion) around the embryo during its development is a key feature of amniotes. Amniotes include three groups, namely Reptilia, Aves, and Mammalia.Amniotic eggs are an adaptation to the evolution of terrestrial organisms and serve as a source of moisture and shock absorber. Chondrichthyes (cartilaginous fishes), Osteichthyes (bony fishes), and amphibians lay eggs in water and have anamniotic eggs. So, the correct answer is option D.