Where do plants live?

What word is this?

Plants in this place have pointy leaves so that too much water can fall off.

What word is this?

Plants in this place have short roots so that it can get water and nutrients. These also help the plants not to get frozen.

Plants in this place have thick stems that have water inside them.

It is a hot and dry place.

It is a place where there are different plants. It is mostly wet.

What place is this?

It is an icy place that is very cold.

What word is this?