The adaptation of having sugar stored in the roots primarily helps plants survive by allowing them to store energy. This energy storage can be crucial for the plant’s growth and survival, especially during periods when photosynthesis is not possible, such as during the winter or in unfavorable conditions. The sugar in the roots can be converted back into energy as needed for various metabolic processes.
While the presence of sugar may also make the roots more attractive to certain animals, the primary survival benefit is indeed the energy storage aspect. Therefore, the most appropriate answer is:
The sugar can help the plant survive by storing energy.