Don't understand why my pictures came up as URLs, & not the actual pictures!

Problem is, I'm just a learner. But they do work if you can be bothered to double click each one in turn :oops:
When I used "upload many images", after it finished uploading, it gave me 4 options.
Forum BBCode (1)
Forum BBCode (2)
HTML
Direct link to image
Which one should I have sent to the "reply" box? (I think I used the second option- just at random - then it wouldn't let me delete the post as somebody had "replied")
Also, when I was uploading, it gave me the choice of what size to resize them to. I chose "for websites & e-mails". Was this correct?
Note :- I need all the help I can get. Computers still confuse me! :blush: