Understanding Monkey's Diet
Monkeys are known for their diverse and interesting diets, which can vary significantly depending on their species and habitat. However, in the context of the options provided, let's explore why the correct answer is "B) Banana".

Why Monkeys Prefer Bananas
- **Natural Habitat**:
Monkeys typically inhabit tropical regions where bananas grow abundantly. Their environment provides easy access to this nutritious fruit.
- **Nutritional Value**:
Bananas are rich in essential nutrients that are beneficial for monkeys, including:
- **Carbohydrates**: They provide a quick source of energy.
- **Vitamins**: Bananas are high in Vitamin C and B6, which are vital for overall health.
- **Minerals**: They contain potassium, which is important for muscle function and heart health.

Behavioral Aspects
- **Foraging Behavior**:
Monkeys are natural foragers and often seek out fruits as part of their diet. Bananas are easy to grab and consume, making them a favorite.
- **Social Eating**:
In many monkey species, eating bananas can be a social activity. They often share food within their groups, reinforcing social bonds.

Conclusion
While monkeys can eat a variety of foods, including groundnuts, apples, and even juice, bananas are particularly favored due to their accessibility, nutritional benefits, and alignment with the monkeys' natural behaviors. Thus, option "B) Banana" is the correct answer, reflecting the typical preferences in a monkey’s diet.