Final answer:
The nurse should apply the ultrasound transducer to the lower left abdomen of the client to assess the point of maximum intensity of the fetal heart.
Step-by-step explanation:
To assess the point of maximum intensity of the fetal heart, the nurse should apply the ultrasound transducer to the lower left abdomen of the client. This is because the fetal position is left occipital anterior, which means that the baby's head is down and facing the mother's left side. The point of maximum intensity of the fetal heart is typically located near the baby's back, which in this position would be on the left side of the mother's abdomen.