Understanding the Correct Answer: Option 'C'

Explanation:

The correct answer to the question "What do these kinds of good snakes eat?" is option 'C', which states that they eat insects. Let's break down the reasons why this answer is correct:

1. Context:
- The question mentions "these kinds of good snakes," indicating that it is referring to a specific type of snake.
- The phrase "good snakes" implies that these snakes are beneficial or helpful in some way.

2. Mother's Statement:
- According to the statement made by the mother, these snakes eat certain things.
- The statement does not specifically mention grass or minor creatures, but it does mention insects.

3. Inference:
- Since insects are mentioned in the statement, we can infer that the correct answer includes insects as part of the snakes' diet.
- Grass and minor creatures are not mentioned, so they cannot be considered as part of the correct answer.

4. All of the Above:
- Option 'D' states that all of the above options (grass, minor creatures, insects) are correct.
- However, since grass and minor creatures are not mentioned in the mother's statement, it is incorrect to include them in the answer.
- Therefore, option 'D' is not the correct answer.

Conclusion:

Based on the given information and the mother's statement, the correct answer is option 'C', which states that these kinds of good snakes eat insects.