animals | A puppy is playing with a ball

PLANTS | A sprig of flowers and an envelope

TRANSPORTATION | train

NATURE | Waves and dolphins

TRANSPORTATION | a bicycle leaning against a tree in a park

PLANTS | A rose

ANIMALS | A horse grazing with its head down

NATURE | Flower field

ANIMALS | A rabbit

PLANTS | A pot of grass

NATURE | a tranquil lake surrounded by smooth, flat rocks, reflecting calm waters, and dotted with a few solitary trees

TRANSPORTATION | a plane in the cloudy sky

ANIMALS | Little lambs