nature

I'm going to group 1,3,4 together. I think the main problems with these are that they don't really have an interesting subject. I like that you're using lines, but typically, it's a good idea to have those lines leading towards a subject. Having a leading line that kind of fades off into the distance is like having a plot line introduced into a movie only to have it go unresolved. The second problem is light. Typically, mid-day doesn't provide the best light for photography. Generally speaking, sunset and sunrise are the best times, with a few exceptions.

As for number two, I think this is your strongest photo as the line leads into the trees. However the light, or lack of it, makes it look a little flat. Perhaps if you can go back at a time of day where the light breaks through the trees, or even if there is some fog, you might be able to get a more atmospheric image, especially if those trees are going to start changing colors.

I hope that helps.