Hi Tejal,
Now, the pictures in this thread immediately struck me as fitting the theme far better than those in the Colour thread.
In the first (5) the development is plain to see, as is the wildlife. I'd be really picky if I were to suggest that I wonder if there was a better combination of the main elements in the scene. Arguably (i.e. not everyone will agree with me), the white building isn't really necessary and its tone and contrast, being much closer, attracts undue attention to it. I also wondered if it might have been possible to shoot just before the boat had passed half way across the frame? Apart from that, it works for me.
The second (4), works least well for me, perhaps because the entire scene is basically the result of development; concrete jetty and folks feeding birds (although I guess you could say that human is interacting in a positive way with wildlife), plus the high rise building in the city behind.
Possibly my favourite is the third (3) due to the correlation of behaviour between human with smart phone and music and the striding gull
The parallel arrangement of bridges near and far also work well.
In the fourth (2), I think I have seen YouTube videos of 'hairy' landings at that airport, so I may be more familiar with the landscape than this shot alone imparts. Good compositional arrangement of layers of receding depth.
The fifth is another one that, for me, there isn't much nature visible, since the gulls colonise urban (aka developed) environments all too quickly. It is a good composition though and satisfactory conversion (as they all are).
HTH, Dave