1. How does everything living on earth live?
　　[A] Each plant can live alone.
　　[B] Each animal can live alone.
　　[C] Everything living on earth can not live without needing other living things.
　　[D] If living things want to live they must kill each other.
　　2. How is food for plants made? Food for plants is made
　　[A] from water
　　[B] from the air in the sky
　　[C] from the soil
　　[D] from water, things in the soil and air, sunlight
　　3. How do all food chains break? All food chains are broken if
　　[A] one kind of animal is eaten up
　　[B] one kind .of plant is destroyed
　　[C] one kind of animal eats another
　　[D] one of the links is destroyed
　　4. Which living things can use energy directly?
　　[A] Animals.
　　[B] Plants.
　　[C] Both animals and plants.
　　[D] All living things.
　　5. Why is all life in danger? Because break up the food chains.
　　[A] human beings
　　[B] animals
　　[C] plants and animals
　　[D] man and wild animals