Answer:
They have to adapt.
Step-by-step explanation:
Some plants can survive in very low-light conditions. If you think about dark, rainforest canopies, there are plants that grow in that environment. They have evolutionary adaptations to handle these low-light environments, which include making broad, thin leaves to capture as much sunlight as they can.
But basically if a plant is green, it needs sunlight at some point to grow. Otherwise, it can’t survive.