Which of the following statements about soybean seed composition is true?

Soybean seeds are known for their high oil content, which is a significant component of their composition. Approximately 20% of a soybean seed consists of oil. This oil is primarily composed of unsaturated fats, which are beneficial for various health-related uses and high in energy. The substantial oil content is one reason soybeans are widely used in food products, cooking oils, and as high-energy feed for livestock.

In contrast, while soybeans do contain carbohydrates, they do not primarily consist of starch; thus, the assertion about starch being the primary composition is incorrect. Additionally, while fiber is present, it does not surpass the oil content. The composition also has water, but it is not the main component as oil significantly dominates the makeup of the seed.

Overall, the assertion that the majority of soybean seed composition is oil is true and aligns with the nutritional characteristics associated with soybeans.