Which of the following is the best title for the passage

单项选择题In which ways is home service industry good for our society

单项选择题What is talked about in the passage

单项选择题According to the passage, dwindle means______.

单项选择题Why did the African nations welcome an ivory ban

单项选择题Since many of the older, bigger- tusked animals have already been destroyed, what did the poachers do