The person or organization providing the information has the credentials and knowledge to speak on this topic because the web site is--the domain name ".org" tells that this site is run by a nonprofit organization.The writer maybe a staff member at the Discovery Institute.
A habitat is an environment in which an organism lives and utilizes the biotic and abiotic factors for its survival. It is within the habitat that the organism will find shelter, food, mates for reproduction, and security.
Allopatric speciation is speciation that results when a population is separated by a physical barrier. It is also referred to as geographic speciation. Sympatric speciation is speciation that occurs without physical separation of members of the population.