3. Which of the following is an example of natural windbreak? A concrete fence B. groen net C. bamboo fence D. ipil-ipil 4. The following are examples of natural windbreaks except A madre de cacao B. green net C. tall grasses D. ipil-ipil 5. What preventive measure can be done in weak post? A. Put braces C. Put grills B. Put water sealant D. Provide fire hydrants​