Use an appropriate relative pronoun to complete the sentences.
1 Global warming is a general increase in the temperature ....is affecting many countries.
2 Michael is the man ... daughter is a well-known scientist.
3 A tropical forest is an area .... tall trees grow very close together.
4 This is the lady ... can show you the way to national parks without a car.
5 Deforestation is really bad in the mountains… many trees are cut down every year.
6 We live in a time … some animals may stop existing because of hunting and pollution