The correct answer should be D - Growth.
The tubers, bulbs, and roots of many plants store starch in them. When young plants are growing, they use this starch stored in the bulbs, tubers, etc. by converting them into carbohydrates by various metabolic processes. Once the plant grows the leaves and shoots, they grow by photosynthesis.
Hope this helps!
(Brainliest would be greatly appreciated!)
