How does tobacco smoke affect a developing baby?
A: It increases a baby's birthweight
B: It increases a baby's heart rate
C: It increases a baby's cell growth
D: It increases a baby's oxygen supply
B: It increases a baby's heart rate
Tobacco smoke contains harmful chemicals that can pass through the placenta and affect a developing baby's heart rate. This can lead to complications such as preterm birth, low birthweight, and an increased risk of sudden infant death syndrome (SIDS).