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