Answer:
She says that there was a time when she bore children regularly, every two years. Six times she had born a boy child and six times they had died. Some had swollen up and with weak, plaintive cries had faded away. Others had shuddered in sudden convulsions, with burning skins, and had rolled up their eyes and died. They had all died; or rather he had died, Bola thought, because she knew it was one child all the time whose spirit had crept up restlessly into her womb to be born and mock her.
Explanation:
C. It furthered physicists understanding of the universe
Basically its what the main verb is, so it would be turns because it turns cool and dry.
