Our challenge was to post black and white photos. My camera does not have a true b&w feature. It does have a feature that allows converting a color image to monochrome and my header was converted inside the camera.
I captured this roofers finishing a job in the late afternoon with almost no color in the white house and late afternoon shadows. The foggy morning sun and bare trees also resulted in a b&w image.
These three were converted to b&w with Photoshop