Hello, I'm reading Stunning Digital Photography and in a Chapter 4 video [ sdp.io/Metering ] there is a photo of Chelsea in the snow. At first the photo is underexposed so Tony increases exposure compensation and shifts the histogram to produce a better exposed picture.
If I were in that situation (as a beginner) I would have increased the ISO for higher exposure. Why did he use exposure compensation instead of ISO? When should each one be used and how are they different?