5 6 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...​