Which of the following statements about insects are incorrect?
A. All insects have wings that help them to fly.
B. Insects are able to crawl or walk using their legs.
C. All insects have delicate wings made of tin scales.
D. Some insects can travel long distances.

Options

A. A and B
B. A and C
C. A and D
D. B and C

Answer

To determine which statements about insects are incorrect, let's analyze each statement one by one:

1. **Statement A: All insects have wings that help them to fly.**
- This statement is incorrect. Not all insects have wings. For example, caterpillars and larvae are immature stages of insects that do not possess wings, and therefore cannot fly.

2. **Statement B: Insects are able to crawl or walk using their legs.**
- This statement is correct. Insects have legs that allow them to crawl or walk. Many insects, such as ants and beetles, use their legs for movement on the ground.

3. **Statement C: All insects have delicate wings made of thin scales.**
- This statement is also incorrect. While many insects, like butterflies and moths, have wings covered in scales, not all insects have wings, and those that do may not necessarily have delicate wings. For example, beetles have hard wings (elytra) that are not made of scales.

4. **Statement D: Some insects can travel long distances.**
- This statement is correct. Certain insects, like locusts, are known to travel long distances, sometimes migrating across continents.

Based on this analysis, the incorrect statements are **A** and **C**.

### Summary of Incorrect Statements:
- **A**: All insects have wings that help them to fly. (Incorrect)
- **C**: All insects have delicate wings made of thin scales. (Incorrect)