However, you won't be able to identify it solely from a picture without specific location context, because the appearance isn't drastically different from starters in other vehicles. To visually identify it, you need to know where to look on the engine. It's usually located on the passenger side (right side) of the engine block, near the bell housing (where the transmission connects to the engine), but its exact position can vary slightly depending on the engine size (2.3L, 3.0L, or 4.0L).
To be certain, use a repair manual or online diagrams specific to your 1997 Ford Ranger's engine to locate the starter. Searching for "[Your Engine Size] Ford Ranger Starter Location" on the internet will likely yield helpful images.