Water vapor exits and co2 enters a leaf through the

It enters through the stoma.

an adaptation is a change or process by which an organism takes to be better suited for its environment. for example; migration is a behavioral adaptation, this is needed because birds are not built to last extremely cold climates. there are different adaptations because there are different species needing to adjust to different things, bears don't migrate; they hibernate.

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint