If you wanted to plant a crop that would provide a good source of starch and sugar calories, and you were not in a good place to grow grain and were not worried about protein levels roots and

would provide a variety of good options

The correct answer is - tubers.

Explanation:

In a crop plant, there are certain parts that are rich in different macronutrients and can be a good source of the particular nutrient. Grains provide starch and other sugar for the energy and calories in a crop, however, roots and tubers are also a good source of carbohydrates in a crop.

Tubers are the enlarged part stored by plants as stored nutrients to provide energy and nutrients in unfavourable conditions. These are generally a good source of carbohydrates