B&W Photography is the recording of single colour, or wavelength, of light. It refers to all forms of B&W photography, recording light in tones of grey ranging from black to white. 

Photography  is the process, activity and art of creating still or moving pictures by recording radiation on a sensitive medium, such as an electronic sensor.

Macro photography is close-up photography. The classical definition is that the image projected on digital sensor is close to the same size as the subject.