The correct summary of the passage is that vertical gardens are an alternative for gardeners who don't have a lot of horizontal space, want to cover an unattractive wall, or just want something different. The choice of plants depends on the wall and sunlight.
Step-by-step explanation:
The correct summary of the given passage is option A) Danielle Beurteaux explains that vertical gardens are an alternative for gardeners who don't have a lot of horizontal space, want to cover an unattractive wall, or just want something different. The plants you should choose will depend upon the wall you pick and how much sunlight it receives.