About _______of all insects are known to feed on green plants.

Options

A. half
B. one-fourth
C. one-third
D. two -third

Answer

To solve the question about the proportion of insects that feed on green plants, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the fraction or percentage of all insects that are known to feed on green plants.

2. **Identifying Insect Feeding Habits**: Recognize that many insects have a diet that consists primarily of plant material. This includes feeding on various parts of plants such as roots, stems, leaves, flowers, and fruits.

3. **Researching Insect Diets**: From biological studies, it is known that a significant number of insects rely on plants as their primary food source.

4. **Finding the Specific Proportion**: Based on biological data, it has been established that approximately one-fourth of all known insect species feed on green plants.

5. **Final Answer**: Therefore, the answer to the question is: "About one fourth of all insects are known to feed on green plants."