a bird and an egg

All bird eggs are amniotic, which means they include a hard shell, a porous membrane for the exchange of oxygen and carbon dioxide, and a rich yolk that nourishes the developing chick. The yolk is made of fat and protein, and the yolk color varies depending on the quality and composition of the laying female's diet.

trees

Trees are vital. As the biggest plants on the planet, they give us oxygen, store carbon, stabilize the soil and give life to the world's wildlife. They also provide us with the materials for tools and shelter.

leaves

female lions

The lion (Panthera leo) is a species in the family Felidae and a member of the genus Panthera. It has a muscular, deep-chested body, short, rounded head, round ears, and a hairy tuft at the end of its tail. It is sexually dimorphic; adult male lions have a prominent mane.