Read the text again. Then choose the correct answers. 1 Plants have different shapes because.... a there are lots of them. b of their environment. 2 The African plant in the text has a problem with ... a water. b temperature. 3 Rainforests are... a wet. b dry. 4 There are so many plants in the rainforest that ... a light is a problem. b water is a problem. 5 A lot of rain means that a tree has... a a deep root system. b a shallow root system. 6 Rain is a problem because... a it makes the trees heavy. b it makes the leaves light. 7 In a tropical rainforest, trees need... a a narrow base. b a wide base. 8 Some plants have big leaves to ... a help the water run off quickly. b to get more light.

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