Final answer:
A lack of access to a diverse diet with adequate sources of protein is the greatest cause of malnutrition and hunger.
Step-by-step explanation:
The greatest cause of malnutrition and hunger is a lack of access to a diverse diet with adequate sources of protein.
Malnutrition occurs when individuals do not consume enough nutrients and calories to meet their body's needs. A lack of access to a diverse diet can lead to a deficiency in essential nutrients, such as protein, vitamins, and minerals.
For example, if a person's diet primarily consists of rice or cassava, which do not provide all the necessary nutrients and energy, they may experience malnutrition. This can result in underweight, growth failure in children, and other health problems.