The correct answer is - the root/the tuber.
The potato plant is a plant that is part of the tuber plants. This type of plants do not use their root as the other plants do. The root in these plants is used both for food production and for food storage, with the food storage actually being its primary function.
Because of this, these plants have roots that rounded or elongated, but solid and as one part, not divided into multiple parts. Their roots have been called tubers because of their shape, but also because of their function. The biggest portion of the stored food in the tubers is starch. The potato is actually the vegetable that has the biggest amount of natural sugars in it through the high amount of starch.
