The answer is true
Endurance training can improve athletic ability, and improve sustainability over long periods of time. (Aerobic workouts involve oxygen, necessary in many physical activities).
B. Interactions with consistent caregivers
Explanation:
In humans, the sex of the baby is determined by the sperm. The sperm gamete is heterogamatic because approximately half of them contain the X chromosome which will result in a girl and approximately half of them contain the Y chromosome which will result in a boy.