Analyze the structure of the analogical arguments in the following passages, and evaluate them in terms of the six criteria that have been explained:

Most endangered or threatened species in the United States find suitable habitat on private land, and the destruction of habitat is widely recognized as the leading cause of extinctions. For these reasons, protecting wildlife without regulating the use of private land has been compared by biologists to playing the piano with just the black keys.
—John H. Cushman, Jr., “Environmentalists Gain a Victory,” The New York Times , 30 June 1995