Answer:
Cropping.
Step-by-step explanation:
Crop tool is a tool in image manipulation softwares that help to remove portions from a picture. It also helps to bring focus to certain portion of a picture. Crop tool helps to discard the unwanted or undesired portion from a composition or picture.
The image manipulation used in the given picture is cropping. The tool is helping to bring foucs on a man rowing a raft.
So, correct answer is cropping or crop tool.