Final answer:
About 45% of deaths of children from birth to age 5 are due to malnutrition.
Step-by-step explanation:
The correct answer is a) 45%. According to the information provided, about 45% of deaths of children from birth to age 5 are due to malnutrition. Malnutrition is a condition that occurs when the body does not get enough nutrients. It is one of the leading causes of child mortality in low-income countries, along with acute respiratory infections, diarrheal diseases, and infectious diseases.