Line Art Illustrations: Use black and white line drawings for insect illustrations, depicting various species in detail. Create simple line diagrams to showcase insect anatomy, behaviors, and ecosystem roles. Decorative Elements: Utilize varying line weights and styles to add visual interest to the handout's design. Incorporate small line art elements like leaves, flowers, or small insects to enhance the visual appeal. Remember to maintain a clean and organized layout, with a balanced use of English and Chinese text. This design will keep the handout informative and visually engaging, even without the use of color. If you have any specific questions or need further assistance, feel free to ask!