Question: Why have neonatal mortality rates fallen less rapidly than under-5 mortality rates globally during these past three decades? Want Online Tutoring? Question options: The neonatal mortality is influenced by complex factors such as prematurity and complications at birth, which are harder to address with existing interventions. The under-5 children have better access to healthcare compared to neonates. The first month of life is the most vulnerable period of child survival. Interventions related to reducing neonatal mortality would require the highest financial investment because they involve more infrastructure.