1) From the changes of the environment........ a) Drought b) Flood c) Fire d) All of them 2) .................caused naturally by lightning strike a) Wildfire b) Flood c) Pollution d) Drought 3) Water hyacinth is harmful to the environment a) True b) False 4) ...............eat insects and other fish a) Crayfish b) Snakehead c) Goats d) squirrels 5) All of the following can harm the environment except........ a) Water hycainth b) Squirrel c) Owls d) Goats 6) ...................can affect water,air and land a) Fire b) Pollution c) Flood d) drought 7) from the causes of drought: the land is ........and..... a) Cracked b) Hard c) Soft d) Both (a) and (b) are correct  8) .............Can happen naturally by volcanoes a) Fire b) Pollution c) Drought d) Flood 9) Flood can bring new seeds and nutrients to the soil a) False b) True 10) Fire can clean out the dead litter a) False b) True

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