Why "habitat" doesn’t have article even thought it is the singular number?
Answer from a Native speaker
"Habitat" written like "habitat" can be singular or plural, depending on the context. Here, "habitat" is plural because it refers to a large expanse of space that is not contained. On the other hand, if an animal enclosure at a zoo was being referred to as a "habitat", it would be singular because it is referring to a smaller, enclosed space. "Habitats" can be used to refers to multiple enclosed habitats, or different types of habitats. Here are examples of the different ways "habitat" can be used: Ex: The shark's habitat is in the ocean. ("Habitat" here is plural because it refers to a large space) Ex: The cheetah habitat at the zoo is interesting. ("Habitat" here is singular because it is referring to one enclosed space) Ex: A sea turtle's habitats are on land and in the ocean. ("Habitats" is plural because multiple types of habitats are being referred to)