To be honest, since we live on Earth (assuming you do as well), Earth is the easiest planet to study. We don't know much about the other planets because we've never been to any of them. I believe that the second easiest planet to study is either Uranus or Saturn.
The answer is b because that's the only place where the leaf can be water to go through transpiration and the water cycle
Answer:
they save energy in darker colder months
