Cropping can be an essential component in the post processing stage of image presentation. For example, a specific element of an image may emerge as the most salient point and needs to be displayed as an individual image. This is where cropping is essential.
However, as we are learning in Developing Your Eye, it is necessary to not only look at what we are photographing but also to really see it.
This is where we all need to develop our skills in composition.
The following images illustrate that point.

The full frame image doesn’t have the impact of the cropped version.

The following full frame landscape view of Chambers Pillar and its companion outcrops is an interesting image.
However in cropped form, the Pillar looks even more enticing.

The following landscape shows the ruins of the historic Pommeroy Flour Mill not far from where I live. I made this image for a competition where ‘leading lines’ was the subject.
However, the historic mill itself is really the dominant feature of the image as demonstrated in the following crop.

The following image shows how infrastructure development in residential areas makes for interesting photography. At the same time, the telegraph pole, conveniently situate in the middle of the frame presents a perfect point from which to crop the image to emphasise the size of the machinery being used.
Of the two options, the copse of trees on the left side could be a distraction where the background hillside on the right has no distractions and that was my choice.

This ‘tired and emotional’ spectator chose to relax in the arena during a gymkhana.
In the cropped version the spectator looks even more relaxed.
The arena just happened to be in the dry bed of the Todd River in Alice Springs, Central Australia. The Control Tower signage is a classic example Territorian humour.

Now just in case the sign’s nomenclature offends, a judicious crop has saved the day.
In closing it’s important to note that the higher the resolution of the original image, the more detail and greater size you can obtain in most crops.
Thanks for looking and till tomorrow, hoo roo.
Mr. Brown after cropping is quite an image. Love the historic mill, too. Great pics.
Thanks, glad you enjoyed the shots. Mr Brown turned 32 this year. We have had him since new. He Is unstoppable in the rough stuff.