Final answer:
Rubin's research points out that ensuring safe passage through pregnancy and childbirth is a key developmental task for a woman becoming a mother, which includes providing nutrients and avoiding harm to the fetus.
Step-by-step explanation:
According to Rubin, one of the four major developmental tasks that a woman seeks to accomplish as she learns to become a mother is ensuring safe passage through pregnancy and childbirth. This key task involves a broad range of responsibilities; from providing all needed nutrients to the developing offspring, to avoiding harmful substances that could interfere with the baby's growth and health.
The maternal role is critical as the embryo and fetus are entirely dependent on the mother for survival, and it is vital that she receives adequate prenatal care to monitor both her health and that of the fetus.