Answer:
The correct answer option is: Second trimester.
Step-by-step explanation:
In the second trimester of pregnancy, (months 4, 5, and 6), the baby's organs are fully developed and they, along with the nervous system, start to function.
At this stage in the pregnancy, the woman may begin to feel your baby move since the baby is developing muscles and trying to exercise them as well. This first movement is called quickening.