The correct answer is birth.
At birth, females infants on an average appear to have a more developed central nervous systems compared to males. This is apparent because female infants shower higher levels of responsiveness to stimuli such as sounds, touch and faces. Additionally, female infants typically acquire linguistic abilities and vocalize earlier than male infants.
Answer: Central Nervous System
Explanation:
The emotions such as pain, happiness, trauma and other sensory things are controlled by the brain. The things that we feel like pain, heat, cold et cetera are also controlled by the brain.
The nervous system has two parts peripheral nervous system and the central nervous system. The pain signals are carried from the knees to the brain by the central nervous system.
Sexual reproduction because your parent each give you genetic information which passes traits onto their offspring such as eye color, hair color, tallness, shortness, noses, etc.
