6. Many organisations have criticized the ______________ of natural resources.
A. overuse B. overvalue C. overview D. overweight
7. Although humans may have the longest lifespan of any ______________, giant tortoises have the longest recorded lives among vertebrates.
A. reptile B. fauna C. mammal D. amphibian
8. The human body is a very complex ______________.
A. living B. organist C. organism D. organization
9. These factors may be affected by ______________ components of the environment such as water supply or nutrient levels in the soil.
A. living B. non-living C. alive D. lively
10. The Amazon river basin contains the world’s largest tropical ______________ with a large number of species.
A. vegetation B. wood C. rainforest D. foliage
