Which of the following can be classified under environmental influences leading to intellectual disabilities?

The correct classification of malnutrition under environmental influences leading to intellectual disabilities is based on its pervasive impact on development. Malnutrition can result from insufficient or imbalanced intake of essential nutrients during critical periods of brain development, particularly in early childhood. This can lead to cognitive impairment and hindered learning abilities, which directly relates to intellectual disabilities.

In contrast, genetic mutations are heritable conditions that do not fall under the category of environmental influences, as they are intrinsic to an individual's genetic make-up rather than external environmental factors. Hypoglycemia, while a medical condition that can have significant effects on cognitive functioning, is not categorized as an environmental influence in the context of long-term developmental disabilities, since it is typically a medical issue rather than a consistently present environmental factor. Thus, malnutrition stands out as a clear environmental influence that can lead to intellectual disabilities.