One way to find out if the photo hosting site has direct image linking capability, is to navigate to the photo you want to link to and "right click" on the image. If you get a drop down menu that includes "view image" and you click on that, it should go to a blank page that only has the image on it. You can then copy that address in the address bar and use it to past the code in your post here. If you click on the little yellow square
with mountains in the lower half and what looks like a postage stamp in the upper right, it will open a little popup window
with part of an address in it. Delete the address and paste the address you copied previously in there and click on OK.
It will load the code into your post to display the image. Its what I did to paste all three images in this post!