If you specify a height but not a width the browser will adjust the width for you.
It does the same if you specify the width of the image but not the height.
You can also use align=top,
middle,
and bottom to change where the text aligns next to the image.
You can also set a border around images
as well as HSpace
and VSpace.
Besides setting the source as an image from a website you can use one from the same folder by putting the file name and type.