story with dialogue brings the characters to 'life' more than if you were to just write a story without any dialogue. It allows for the reader to characterize all of the people involved in your story.
The correct answer is option A. The passage clearly talks about Marsupials since it mentions its characteristcs such as their physical appearance, way of living and place, among other details. Although it talks about kangoroos mostly, it also mentions and characterizes another marsupial, that is Wallabies. Option B does not capture the main idea of the passage, since it talks about both kangoroos and other marsupials. Options C and D refer to specific features of kangoroos, they are too specific to be considered a summary of the main idea of the passage.
I cant help you if i dont know what the exerpt was about