Final answer:
The exaggerated features of a biiga doll likely represent fertility and prosperity in the context of the societies that created them.
Step-by-step explanation:
The exaggerated features of a biiga doll, such as modeled breasts, swollen bellies, and incised lines drawing attention to the pubic region, likely represent fertility and prosperity in the context of the societies that created them. These figurines were found across different regions and were often associated with symbols of reproduction, pregnancy, and maternal health. While the exact symbolism may remain a mystery without records from the creators, the prevalent characteristics and cultural context support the interpretation of fertility and prosperity.