Решение:
- b There are a lot of trees. (forest)
- a There aren't any plants because it's too hot. (desert)
- d This is a mountain but it hasn't got a top. (volcano)
- f People live in this big place. (city)
- c People live in this small place. (town)
- e There is sand next to the sea. (beach)
Ответ: 1-b, 2-a, 3-d, 4-f, 5-c, 6-e.