Sunflowers interact with the environment.
They turn their faces toward the sun.

Sunflowers always face the sun to get the most sunlight.

Sunflowers track the sun across the sky.
This activity is known as solar tracking.

Sunflowers track the sun from east to west
and turn back east overnight to await the sun.

Why do sunflowers follow the sun?
Source | Science Magazine

Timelapse of a sunflower from seed to flower to seed
Beautiful footage with a sad ending
Source | khtam