Shadow , Shade
Shadow refers to a dark shape made by something blocking the sun or a light. Shade refers to a dark area where the direct light of the sun does not reach.
He looked at his own shadow on the wall.
The old trees cast a shadow across the road.
Half of the park was in shadow.
The temperature was 40ºC in the shade.
We sat under the shade of the old tree.
These plants need a lot of shade.