The image doesn't show because you are using...
<img src="C:\HTML codes\images" />
1. The SoloLearn server has no access to your C: drive
2. That's not even a valid image file name, it looks like a folder name.
3. The path contains spaces, which is not web safe.
4. In HTML 5 the image tag has no closing tag so does not need /> just > will do.
5. In HTML 5 the src and alt attributes are mandatory.
Note: 4 & 5 would not prevent the image from showing there just FYI.